The actual truth if you believe Christian theology. Angels AND God are fully capable of changing things, but free will is sort of like the Prime Directive in Star Trek if you want to be charitable. Uncharitably, we’re God’s play things and only a tiny fraction of the most loyal will see true reward.
The vast field of ambiguity between those two points is … kinda’ the point in why there has been so much quarrel even between Christian sects.