I think you're making assumptions about people's motivations that aren't consistent with evidence.
Pornhub and similar sites are full of content that is a dime a dozen and available for free and does not suggest any kind of "parasocial" relationship with the viewer. It's just two or more people fucking. And it's the same as it was ten years ago. And yet... More of that content keeps being made. Porn production companies exist. Pornstars making money for fucking on camera exist. Clearly there are people willing to pay for new porn that will just end up on free-to-view sites anyway.
Your mental model of "it's all about the parasocial relationship" doesn't explain these facts. Thus your mental model can't be the whole truth. I suspect it's at most a fairly small part of the truth.