I disagree. The reason porn sales are down is that with tube sites and bit-torrenting, it's easy to get it for free. The music industry has the same problem, but at least bands can make money selling tickets and merchandise, or licensing their songs to car commercials.

I think the desire to see old / gross male talent in scenes is a particular fetish, and it may not be as widespread as you think. In fact, I suspect some viewers actually have the opposite desire because they want to imagine themselves as young and in-shape.

Personally, I don't care what the mopes are like as long as the girl gets fucked hard and competently.