The only barriers to entry are having a smartphone and being able to push a couple buttons and swipe. That's not creating an environment that's even remotely exclusive, and there's zero reason to believe the few people who are excluded by it are more likely than others to have an STI.

And vetting them how, anyway? You might be able to find out whether someone is a felon, but I have no idea how I would (legally) find out whether someone has a transmissible STI.

This seems like a product of some kind of cognitive bias.

You're falling into a common misconception of assuming you can tell the likelyhood of a person having an STD by the rest of their attributes.

Fact is, I see very little correlation. Intelligent, well-paid, well-groomed, well-cultured men who bitch and moan and complain about having to use condoms only wondering if the girl is on birth control.

I don't think you can vet someone for STDs ahead of time. You can only practice safe sex and hope for the best.

You really can't know though, unless it's explicitly stated in their profile which I doubt it's very common.

there's no free lunch, if it reduces the cost of meeting strangers looking for cheap thrills, then it certainly must certainly raise the risks of contracting disease from the very people which it has allowed to freely enter and leave as they please.