I think so. The traditional definition of an "illness", I think, is something that would cause you pain even if you were stuck on a desert island. Eg., even if you were stranded in the middle of nowhere, you still wouldn't want to get the flu. The point of the post is that the word "illness" is gradually being redefined more broadly, to "any physical/mental characteristic that society views as negative".

Eg., if I were 4'10", and stuck on a desert island, would it bother me to be 4'10" instead of 5'10"? I doubt it, unless it comes along with some sort of physical deformity; that's only a difference of 17%. Yet, if I were 4'10" now, it would probably have substantial negative effects, like earning less, and being considered generally less desirable in dating.