You're making an assumption.
I owned an operated a "free" adult website for 18 years. For 15 years it was my primary source of income. During those years I always got a kick out of "there is so much free porn online, why would anyone ever pay for it?"
The way that my website worked was that it was very content-rich and content-focused. The content came directly from the affiliate programs that I was advertising for. Despite it being all advertising, I often got compliments that my website was "ad free." That's because I didn't push banner ads or anything intrusive. It was free content plus a text link that you could click on if you wanted more of that content.
The website shut down in 2022, and the bank accounts are all closed. But many of the affiliate accounts are still pulling rebills.
Most of the subscription based websites that were advertised were not websites that promised any sort of interaction with the performers or models. It was very obvious that you were paying for content, not social interaction and if anyone were ever confused as to that, the rebill numbers would have reflected otherwise. The fact that an indivdual subscription rebills is not a conclusive indication of a happy customer. But when so many in the aggregate rebill, it doesn't really paint the picture of a large number of people feeling duped. It's also worth noting that chargeback rates were nearly non-existent. I could count the number of times that happened over 18 years on one hand.
Now, if you've read this far thanks, I will acknowledge that we're talking about OF specifically.
At the risk of TMI, I subscribe personally to one adult content site: suicide girls. I am happily married, I'm not looking for any social interaction. It's purely eye candy. Many of the models on that site promote their personal OF pages, and while I haven't subscribed to any, I will admit that I've been tempted because they produce content that I like and I'm curious about what else they offer. I'm not at all interested in DM'ing them or trying to start some kind of parasocial relationship. I've watched a few live streams on SG, have even had some interaction in the chats in those ... but there's no desire what-so-ever to try and have some kind of "relationship." I've never tipped them or sent them money or gifts. Just the annually recurring subscription to the SG website.
People who are in difficult situations in life, have mental illnesses or physical disabilities may try and use online porn to fill a void in their life, and for some it may be unhealthy. People also stalk celebrities for the same reason. Yet we seem to make more assumptions and talk about it a hell of a lot more when it comes pornography for some reason. I'm not saying that there aren't social issues that are important to look at and talk about. But when it comes to porn there's such a taboo and willingness to shame others and make mass assumptions about their motivations even though we have very little idea of what we're actually talking about.