Many parents do not have their kids best interest at heart; from religious fanatics to divorced parents using their kids as pawns to failed athletes living vicariously through their "he'll be in the NHL someday" fantasies to just parents who didn't want have kids and don't care at all.
Then there a whole slew of parents who genuinely want what is best for their kids but won't succeed due to incompetence or their own issues with drug addition or passing on generational trauma.