Listen I'm not really in much of a place to talk about fatphobia since I'm not fat myself but like, it's very weird how people talk about weight gain as a side effect of antipsychotics. I was originally told by psychiatrist that he was hesitant to try olanzapine because "it'll make you fat" as if that was somehow worse than mania and psychosis?
Not saying that there aren't any side effects from antipsychotics worth being scared of, but weight gain isn't one of them. It's ingrained into a lot of people to be scared of the weight gain you might experience from antipsychotics, but mental illness is way scarier than being fat. It's just more proof doctors prefer sick thin people to fat healthy people.