I have found that many who reject the idea of God make arguments against ideas about how God created -the time frame in which he is said to have done so, etc....
and those ideas aren't usually correct or even biblical. The arguments don't usually have anything to do with the possibility of the existence of a life form with certain characteristics enabling extreme power, awareness, etc...
Many "creationists" have made assumptions about what is written in scripture, and refuse to consider anything else.
It is also true that many "evolutionists" have seen no proof of the existence of God (and have also heard errant and even outrageous claims about God and creation) -which also leads to assumptions based on that.
Science does not venture far from the unknown. It does not consider hearsay, but makes some assumptions which seem probable given what is known -then sets about proving whether or not they are true. Even when the assumption is then known to be false, new "knowns" are often learned and added to the rest, which direct further investigation.
As we plan our actions and activities based as much as possible on accurate data -so as not to fail, that caution is understandable.
Still, it can be said that science begins with acknowledging ignorance -and travels toward decreasing ignorance.
(Scientists, however, do sometimes allow very unscientific prejudices and influences to taint the process)
"God" is essentially as far from the "known" as one can get (from the perspective of science) -regardless of whether or not historical firsthand accounts are true -or even if one or a few were to have similar experiences today.
However, the perspective of such a being would be very different. Science is first a reverse-engineer, then an engineer.
"God" would be the engineer of all science could reverse-engineer. God would be the source of all science could learn.
If science had access to such a knowledge base, there would be little left to do in the reverse-engineering department -and much more could be done in the engineering department..
What is called "evolution" has resulted, overall, in life forms which are increasingly complex, which have increased power over their environment, understanding of their environment and ability to change their environment to suit them. If we follow this process to the end of its course, the end-all, be-all would be a being which was invulnerable to its environment, perfectly aware of its environment and perfectly able to manipulate its environment.
Therefore, we cannot reject the possibility of the existence of such a being -even yet future, as a result of the process called "evolution".
We cannot assume that it would be the first instance of such -(nor can we assume that a similar being would necessarily have to come exist by this process -being different in that it did not, which would necessarily be so if the process was initiated by an intelligence.)
"Evolution" however, is something of which science is admittedly ignorant -yet which is increasingly understood.
What is known about evolution cannot be proved false -though some are ignorant of what is known. What is assumed about evolution may yet prove to be false.
Similarly, if the biblical accounts of firsthand dealings with God (more correctly, the Word), angels, etc., are true -and were even happening today -some would still be ignorant of such.
If one or a few met God in person, science would understandably say "Evidence, or it didn't happen".
If one describes God in a certain way, and that description proves to be false -such as God having created everything about 6,000 years ago -and so evolution cannot be true -all that has happened is that the description is then known to be false.
If that is what the bible said to be true of God -WHICH IT DOES NOT -then the God "of the bible" would be known to be false. This still does not prove that no similar being exists or could exist.
The bible actually does not say that all things (that would include "the heaven") were created 6,000 years ago -but that after their initial completion (Job 38 concerning the earth specifically), the earth somehow -and after an unspecified amount of time -became formless and void (Gen 1:2 -check the definition of "was"). Therefore, what follows would be a renewal of the earth -in preparation for man.
It does say that Adam (who came to exist about 6,000 years ago given the genealogies in the bible) was the first "man" by biblical definition -NOT scientific definition.
The bible says very little about what specifically happened in the ETERNITY before Adam -or what happened on the earth during the unspecified amount of time from its initial completion to its becoming formless and void -waste and ruin. It does, however, indicate that angles already existed at the initial completion of the earth -at which they jumped for joy -and that a third had already rebelled and attempted a coup against God's throne -ascending from beneath the heights of the clouds -and were subdued before the events in Eden. War and neglect tend to wreck things, perhaps they were the cause of the waste and ruin -it doesn't say for certain.
Anyway -back to the point.
The God of the bible is described as a being which purposefully hides himself and certain knowledge for various reasons -so it's of little use trying to prove to "science" that God exists.
It also says he will reveal himself to all in time -so he's not worried about the fact that science cannot prove he exists, or that it is not presently interested in doing so.
He is, however, interested in how people deal with those things they do know -and which are apparent to all -those things which are obviously right and wrong. He will judge them according to "their works".
If he reveals certain things to certain people -they are then responsible for those things.
All that the engineer has kept from us -and has not revealed -could be accurately described as "the tree of life".
Subduing the rebellious angels and keeping man from the tree of life are necessary limitations of power and knowledge.
Our progress has been slowed while we learn important spiritual lessons -without which we would only cause greater ruin and misery.
We have to travel to a point where it is possible for us to KNOW both good and evil -but to only DO GOOD -which would not then have been the case.
Gen 3:22 And the LORD God said, Behold, the man is become as one of us, to know good and evil: and now, lest he put forth his hand, and take also of the tree of life, and eat, and live for ever:
This was the reason for the confusing of speech at Babel -to postpone the inevitable.
Gen 11:6 And the LORD said, Behold, the people is one, and they have all one language; and this they begin to do: and now nothing will be restrained from them, which they have imagined to do.
Gen 11:7 Go to, let us go down, and there confound their language, that they may not understand one another's speech.
When we have been perfected spiritually, we can then be trusted with great power and knowledge.