Amateur porn is absolutely not the default, as even a cursory glance at porn sites reveals. Gonzo and amateur porn are categories but most porn is made to make a buck. Performers like getting paid because they like to eat and not be homeless, and suggesting that most of them don't want to be paid is simply not true. That's like saying most homeless people choose to be on the street - it's an excuse to ignore their problems, though I appreciate you may not have meant it that way.

Btw I base my views on over a decade in the indie film (not porn) industry, and from having a lot of friends and acquaintances who are sex workers, and who are already having a tough time dealing with FOSTA/SESTA.