What are you talking about here?
> unhealthily large muscles
Taking steroids and other activities related to bodybuilding and sports more generally can sure take their toll, but I'm pretty sure nobody has problems because of overly large muscles.
> most body builders are unhealthy low in fat
Source?
> But of course, that is not what they desire, for that falls under what they consider to be their conventional ideal of beauty [...]
Aren't you contradicting your point now? Or maybe I misunderstood what your point is?