Why can't people accept that God is just a fantasy to comfort us?

Sure, it feels amazing to think that there is an all-powerful, all-knowing being who always has our backs, but people rarely think logically about the idea of God.

1) If God is perfect and infallible, praying is useless because you are then asking God to change His plans, meaning that He isn't infallible.

2) If God is all-knowing, then we cannot have freewill because freewill implies a future with no predestination.

3) If God is all-loving and benevolent, then He cannot be all-powerful, because if He were, He would design a world with no evil.
Why can't people accept that God is just a fantasy to comfort us?
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