If you want to go along that line, then:
If God exists, why does God allow so much unwanted pain to exist?
Because you want to live. Because you'd rather experience the pain then not.
I wonder why you are making mention to a contingent matter.
Because it is contingent on your choices.
It just happens to be the case it is necessary in our current world.
Physical form is temporary. It's not permanent. I suppose God could create a static reality but I don't know why. However that would mean you couldn't exist.
It is not strictly a matter of will, but also a matter of capacity.
God could restrict the abilities of various entities and elements to don't influence our lives. Yet he does not.
Every entity is equally independent as far as I know. Why should God play favorites? You are free to make whatever choices you want. So is every other being. We all have to deal with autonomy.
Taking over my will is unnecessary.
He could change the universe to exclude us from suffering by changing multiple other things.
So can you. Why would you want everything handed to you? You want God to stop the independence of part of the universe cause you can't handle it? I suspect you will be able to give up at some point. However right know you still choose to cling to life.
This is not what you said before. Did you change your mind?
I was focused more on God as a transcendent being. However you seem to want to deal with God's immanence.
But there were already other "people" to share existence with. And they weren't divided between groups, nor there were any instincts of procreation playing any role.
This is want the universe has chosen. In some cases a choice of mechanics, in others one of intelligence. This was done independent of God as a transcendent being.
Think of the whole of the universe as immanent God. Of which you are a part of. Your independent choices affect the rest of the universe to a greater or lessor degree. The whole of the universe acting independently makes the actuality of the universe. Parts of it suffer because of the actions of other parts of it.
However part of you remains transcendent. You can transcend suffering, you can transcend the universe. The universe holds power over you because you allow it. You allow the universe to cause you to suffer because you want to be here, you want to exist as an independent entity.
You can transcend, give up that independence. However your desire to continue to exist as an independent being keeps you here. Your desire gives the universe power over you and causes you to suffer. Enslaves you to sin, as the Christians say. You have to learn to have control over your desires. To not be controlled by them. Then you can start to gain control over the universe. You can be more at cause and less the effect. Then you can still decide to check out/transcend or remain and affect the universe at a greater capacity. You can cause or alleviate the suffering of those who remain enslaved. It's up to you as long as remain immanent.