As you've admitted yourself, this isn't the kind of thing you're into and because of that, I think you're running the risk of demonizing an industry simply because you cannot understand nor relate to it.

Titillation has always been profitable (eg why product advertisements feature attractive models) and it's not always about loneliness (though I'm not going to dispute that it sometimes is). Sometimes it's just about fun or primal desire. I know couples who have been to strip clubs and paid for dances -- happy couples who just enjoy the adult nature of it after a few beers. It's also entirely possible to lust after something without being lonely. Just as it is possible that some people have a comfortable income and feel like they want to pay for the content they consume -- whether that's literature, music, film and TV, or nude selfies. You might intellectualise about which form requires greater creative input but ultimately there's still someone putting themselves out there and trying to pay their bills.

I tend to look at this stuff like fast food. Some people like it, some people hate it. As long as you consume it in moderation -- which most people do -- then it has a right to coexist with fine dining restaurants.