Parents making their kids fat is abuse. End of story.
People being fat is personal choice and will power more than genetics. Fat people have the choice to be fat. No one's born fat. It's something that's learned.
You say abuse.. It could be and it could not be. You do know there are some places where extreme poverty is not a new thing right? Then tell me, if those people who have tasted poverty for almost all their lives finally get a chance to a better one. Do you think they will take it slow? Nah not really. Also, what about depression (that extreme sadness that is slow and very painful), stress, disease, natural. You do know there are those with natural big bones and might look gigantic or fat too. No one is an inch perfect, trust me 😊