Again, if you read her post, she says "but overweight guys do not interest me", which, to me, is her talking in general.
Maybe I'm being daft, but what's wrong with that?
I am not attracted to overweight men, and at the same time I am also not attracted to super lean and lanky types either. That's a question of personal attraction and preference. When you date somebody, these things do matter; it isn't as if we owe it to everyone to be attracted to them for fear of hurting their feelings.
If somebody says that they won't pursue overweight women, short or bald men, etc. - well that's their prerogative.