Sometimes I see comments like this and it's like someone is posting from another galaxy. I've literally never heard of a movement that says that can be healthy

Sometimes I see comments like this and it's like someone is posting from another galaxy. I've literally never heard of a movement that says that can be healthy. How did that even happen? Edit: link for HAES https://en.wikipedia.org/wiki/Health_at_Every_Size https://en.wikipedia.org/wiki/Health_at_Every_Size