If you meet someone on a dating site, then you know they're interested in dating. And if you mutually match them (as most apps work now), you know they're at least a little bit interested in you.
If only the dating app companies were treating their job with respect and as a duty to society instead of perverting it for profit incentive, it would work much better for its intended function than it does now.
Just repeating what I've been told, mainly by "older" women (30+), many people like that sort of attention, and miss it when they no longer receive it (more of a thing for 50+ people).
It's often not perceived as harassment or inappropriate, but of course it varies from person to person and also depends on how it's phrased ("would you like to get a coffee?" vs. "I want to cum on your face").
Based on what I've heard from women, it's bad for them too. Easy to find a root, but hard to find someone to introduce to mum and dad.
IRL dating is worse. Apparently in the post-#metoo era men just stopped talking to women in general.