I know you are talking generally, and probably in a ranting way, but really...I don't know ANY parent (thank God) that doesn't take good care of their child. :(
I love my cats and dog, and I do take excellent care of them (heck, I have fostered plenty of dogs I do NOT 'own' this year, and took fab care of them, too), the two ideas- pet ownership and child "ownership" are not mutually exclusive.
There are people that shouldn't be parents, and there are people that shouldn't be pet owners, and their are people that shouldn't be either.
I would rather we all join together to fight ANY abuse, then take positions of betterment.
Just sayin'.