Only Fans and Payment Processors in the Sex Industry

Hi everyone, the news of the OF decision to remove content of a sexual nature seems extreme, given the money they must be leaving on the table.

How is there not a Stripe for 'riskier' industries? There do seem to be some processors but their reviews are that they are expensive/poor UI/UX. Is it chargeback risk? Or lack of banking partners willing to work with this? Or the risk of child abuse material on the sites? Or is it a good area for sexy stripe to pop up?