I get where you're coming from and this could be hard for me to understand as a non-parent. I'd imagine it'd be devastating to have a fat kid if you did everything "right" as a parent. But parents are still responsible for the health of their children. If your child becomes addicted to drugs, you take him to rehab/counseling/etc. If your child becomes fat, you take him to a dietician/fat camp/etc. ...But then I'm sure the fativists would call CPS on those parents for fat shaming their child.