If It Can Happen, It Will
It seems that if something is possible within the way Existence is set up, then it is likely to happen.
If it is possible, then God is going to explore it to experience itself in even more richness.
So my life has a human being is just the playing out of one way it can happen. One strand in the overall and infinitely rich tapestry.
If we ask why? The answer may be just because.