Maybe you need to answer that, but I'm an atheist.
Perhaps it would benefit you to reappraise the framework the discussion is being held in. If you cannot help but conclude that every discussion concerning God is about proving Gods existence and thereby base all your arguments upon that then you should refrain from debating every argument here with that as a basis with which to begin.
This discussion was framed around a presupposition of an existent God with certain qualities. Not a proof of Gods existence mind you but an apologetic discussion along the lines of if/then propositions. If God is so powerful and good then why....or if Adam and Eve were perfect then why....
If God exists then what might the purpose of its creation be? etc.
These questions are generally in the line of critiquing and criticizing the Christian faith. The rebuttals are generally along the lines of Christian apologetics specifically concerning how these seemingly contradicting ideas may be explained as logically coherent possibilities and that is how I am framing the discussion.
I have given one possibility for the purpose of this creation in that frame of reference.
The universe has no apparent purpose, nor need it have one.
This seems to me to be a statement that is no better than simply saying the universe has a purpose if God exists. There is no reason to suppose that a creation must have the ready appearance of its creator to itself, that is to its conscience self - humankind for instance. That purpose may be discovered without providing a complete description of its designer if that designer so chooses to implement its possible discovery into its design. Christianity tells us this is the case-implied in scripture.
So...your opinion, okay. But I'm more interested in the meat you clothe these bones with. What makes you think the universe has no purpose for instance? After all design seems to be "implied" throughout, though this may merely be an appearance and not an actuality.
Nor would we need to know what that was if it had one
This seems to be a vapid statement. Why wouldn't it behoove us to know if the universe had a purpose, especially if knowing that purpose might give benefit some how? This isn't the same as claiming we cannot know such things for sure since no proof has been presented to date that we can't. Or has there been?
So, ironically we cannot know if we cannot know until we know.
Maybe the purpose of the universe is to make stars. Why should we care? It's not our purpose.
Why? Because its in our DNA to seek answers. Funnily enough in claiming "it's not our purpose" your suggesting that you've thought about it, even as an atheist. That indicates that it is important enough to you to draw your interest. Doesn't that bring us back to seeking purpose for the universe? Purpose draws us to action, that's why we seek it.
Anything without purpose is arid, sterile and stirs nothing within the soul. In essence, we seek purpose in the universe because we are inexorably made to be drawn towards that state. I think, normally, the human mind rebels at meaninglessness.
Why should we care? I would have thought a person as intelligent as yourself would never ask such a thing.
No, skeptics use human standards to explain that the god you describe is not a good god.
The point is Skeptics and many believers alike mistakenly apply human standards to God. What a human considers good is defined through expediency and what is deemed pragmatic but always born by ignorance. God is good because it is the only concept which allows for perfect justice in reality. Gods essence may necessitate the possibility of evil in creation - evil being defined as that which apposes Gods purpose for creation.
If you want to call it good, but I deem it evil, then my choices are to reject your claims or paralyze my conscience and begin accepting that I can't tell good from bad and have to read it from a book.
If reality hasn't shown you that that is exactly what some people need then you need to open your eyes. We have recorded "laws" for a reason. That is to initiate justice when those laws are broken. Justice cannot be initiated in accordance with unrecorded laws. One mans evil is another mans good but the law ideally clarifies the most just action a person should take. Scripture warns against such relative ideations.
Isaiah 5:20
Woe to those who call evil good and good evil, who put darkness for light and light for darkness, who put bitter for sweet and sweet for bitter.
Not everyone recognizes what is good nor what is evil. Look at Hitler, Stalin, Mao Zedong, etc. etc. Do you think they thought they were doing evil or good? Yet they all thought is would be good to eliminate cancer by eliminating those they deemed deficient. Their version of making the world more just.
It has been mistakenly perpetuated that Gods qualities cannot allow for evil in reality. A good God cannot allow suffering without contradiction in his essence. However even God can only exist within the possibilities his essence allows.
God is good because he sustains justice in the inevitableness of evil. God is omnipotent because he is the only being by which that perfect justice can exist.
In other words with or without God the allowance for "evil" and "good" in the same reality may be an inevitability. But only with God does perfect justice become possible.
People see what would be gratuitous suffering if this god existed
Presuming gratuitousness and actually being gratuitous are two quite different things. Especially when it comes to the complexities of understanding reality with the limited tools accessible to us.
either it doesn't exist or isn't really a friend, and so reject the claims of those who say it exists and is good.
That rejection is based in ignorance perpetuated by well meaning believers and disbelievers who reject any and all answers based upon what they expect of such a God in relation to what they think they know about reality.
You translate this into some character flaw
Who's character flaw? And how do you mean translate.
this is just the atheophobia of the religious, who have often been taught that atheists are morally defective,
Atheophobia - vocabulary word of the day. Sadly your right. That just goes to show that religious people are normal human beings just like atheists when it comes to being subject to judging others.
Christianity provides an attempt at remedying this in humanity for those whose character requires being remedied. What remedy does Atheism provide for those suffering from theophobia? Seems many atheists are taught that believers are logically defective without understanding what that entails.
and so understand a simple rejection of a bad argument in terms like yours.
Terms like mine? And what terms are those? Theological terms? Seems given the subject those terms are aptly applied.
As I've said, the argument is bad because of bad presentation of a complex subject. The premise may be correct though. I've ran into many terrible arguments in support of good premises.
So which, if any, of those 3 statements do you fall under I wonder? You seem to be angry at the thought of God and "evil" existing in the same reality. Perhaps we can explore the implications together and see were it leads?