Imo the bigger issue is the anti-natural way of reproduction by our species, are we getting smarter and smarter in average, I could really debate that (you could just look at all the movies they pump out).
Are we becoming less intelligent as a whole race because of short term greed by some group of people?
The problem is giving them attention/relationship despite the fat.
The reformed fat girls I know have both (there are only two) said they got fed up with being the 2am safe bet for a cavalcade of cocks.
If you ask me, it's just that men are thirsty and will adapt.