This is an extremely generous view. It's well known that cam sites often feature trafficked victims. Why wouldn't you also assume that an OnlyFans is also run by a trafficker?
You cited yourself that the industry is predatory and exploitative. Do you honestly believe that most of these woman truly made this choice themselves?
But the proper incentives would need to be in place. She'd need to be allowed to stay in country if she is a foreign victim of trafficking, for example. We would want to prevent this from becoming some type of guild where incumbents can keep out new competition. And the police would need to be supportive in this process (i.e. promptly inform OF of models' eligibility, and otherwise participate in the process in good faith). It's hard to see that happening in, e.g., the United States.
On the other hand for individual content makers using this platform gives them far more control over the type of content they produce and a fairer share of the profit.
It is unnecessarily gendered to treat OnlyFans differently just because the many content creators on OnlyFans are women leading with their bodies. Maybe you weren't aware of other services that let people charge for DMs that simply didn't get associated with adult content, maybe that's not what you meant, but the comment you replied to said the OnlyFans platform is less about the nature of its product and more about who its content creators are, which you seemed to disagree with but then replied with a completely different comment.
So if we took misogyny out of the equation no one would think OnlyFans favors attractive women?