If fat phobia is now a thing why can’t skinny phobia also be recognized as a thing?

Both just shouldn’t be a thing, both is bad to the point of killing people. We shouldn’t justify bad, outright dangerous behavior of people because it’s phobic this and phobic that to call out people that are harming themselves. No you can’t be healthy and fat and no you can’t be healthy and anorexic, sorry but that’s the truth