Emaciated is worse than fat but fat is still bad.
If a woman is 5'10 it should be normal for her to weight, what, ~165lbs. If a 5'10 woman is tipping the scales at 110lbs., there's a problem.
Conversely, a 5'4 woman should weigh ~120lbs..; if she's 220+lbs., that's another problem.
You have many of these models (and athletes for that matter) taking horse and bovine drugs to lose weight (along with cocaine); that's a systemic problem.