Why would anyone want to change their thinking, instead of just learning more, perhaps increasing their intelligence, and then coming to a conclusion?
I believe God to be quite capable of dealing with each of us on a personal level. So perhaps what you consider to be turning away from Him, is different for both God and other individuals, and He doesn’t see it as turning away, but merely taking a different path.
As you say, it’s His work in us which produces the doctrine (thinking, also translated as a noun of faith) in us. His work in us is our faith which is manifested in each of us, individually.
I see,...sort of like eating the fruit from the tree of knowledge of good and evil. I think we both know where that leads.