Sure. Agreed. People can believe whatever they want about their bodies.
The issue is the disconnect between healthy body image and actual health. My issue with Oprah (for example) is she sells the love but never the facts. Concequently people believe they're going to be fine with diabetes, as long as they love their bodies. Sorry, but that's a lie.
As for shame. Yeah, abuse is wrong. I'm not in favor of abuse. But lies aren't helping either. Normalizing the unhealth is bringing the (healthcare) system to its fat little knees.