I think that held true 15 or 20 years ago when porn stars 'belonged' to their studio and those studios worked together to keep it that way. Studios now are sites, and most stars are basically contracted, but not in the same ways.
Watching others that speak about it now, it's easy to keep it separated if one needs, but it's also much more controlled by the actor.
Onlyfans is literally not even like that. It's 100% controlled by them. Josh decides everything he does, and the only pressure is to keep the people paying. As you know, he's pretty into the things it buys him. If he invents and uses it to buy a future, he can leave it any time
I wasn't calling you out specifically, but I don't think Josh isn't going to have any issues. He worked hard to make his body desirable and enjoys being desired. He's enjoying this right now and probably will for years