I don't think it's that skinny dudes are fashionable, I think it's just that so few people are actually in shape, it's a completely unrealistic standard to set, so they don't.
Most people are overweight or skinny, like 95% of people fit those categories....less than 1% of men meet the standard of this sub.
The reason why women's go to is "skinny with abs", is because that's about all they can realistically expect...if they said I only like "huge and jacked", they'd be frequently single. So they don't say it, even though that's what they'd most likely prefer.
If Rob Gronkowski is standing next to Tame Impala, idgaf who it is, the chick is picking Rob.