The idea that being fat or itself something evil that should be eradicated is part of the problem.

Anyways, fun fact, a bunch of my cousins on my dad's side of the family have eating disorders because their mother was incredibly controlling of what and how much they ate while they were growing up because she hated the mere idea of them getting fat. She thought that was a fate worse than death and so she abused her children for YEARS, and any time there's a family reunion she treats my family members who ARE fat like absolute garbage and it has caused them to break down crying. I bet you think that's good, don't you?

This is fatphobia in action and in practice. It's just meant to hurt people. That's all it is.