Not really true. Both cause the same sort of diseases and defects, in large part, other than obesity being more likely to lead to Type 2 Diabetes. Then again, bone fractures are very common among anorexics, and tooth issues are quite fast to appear.
Genuinely anorexic people are not "pretty" at all.
Nobody said they're pretty, but anorexia can fixed by injecting and forcing food and nutrition down them. Try force releasing fat, artery clogs or hardened hearts. Anorexia can also be fixed FASTER when there's a threat of death, try scaring a person into losing weight, they couldn't even if they wanted to.