The issue being that slim people can, and do, have unhealthy habits also in terms of eating. But due to a genetic lottery manage to avoid the level of abuse that larger bodied folks experience. And thats not even getting into the abuse we get despite having EDs, we can't even access care.

We all have (to a degree) different bodies, and we all have to do extra work and put extra effort in depending on what those differences are. If you personally have to run an extra 1k a week because of that or not eat as much sugary food, would you not prefer to accept that and then deal with it?