With traditional adult entertainment, creators are aware of the social ramifications (e.g., social stigma, familial ostracism, difficulty dealing with the future, and so on), and there is a decent theoretical economic framework to measure that.
I am not sure if there's the same this new army of "civilians" joining OF, let alone the additional toll it will take on the creators in terms of social ostracism, future prospects, future opportunities, and mental health.
Why though? It is an interesting issue when you look closer. For an individual, it's more obvious - I wouldn't like to be with a prostitute because of possible hidden diseases and lack of trust - but there is no way of telling how many sexual contacts my new partner had, whether paid for or not.
But I wouldn't have any problem working with an ex-pro in the same company or team, they would be just a colleague like all the rest, and I can't imagine any adult making any immature comments about the past of any colleagues on my team.
In stable families and societies, women use sex as control (power) over men. Younger women who sell sex are undermining that power structure. That is why they must be punished.
Another way to look at in economic terms: Female sex is a scarce resource. Female selling transactional sex is commoditizing this resource. In general, people don't like their valuable service getting commoditized.
As a married person in balancing my finances I always then half it and then subtract 20 percent of my pretax income to find what's truly mine after liabilities to my spouse. This makes me explicitly aware of the true cost I pay, and if god forbid i am divorced i have already mentally written off most my wealth and home I painstakingly singlehandedly built stick by stick over a period of years as not actually mine.
Prostitution causes a real problem here as it throws a bone in the resource extraction from male to female by making the consumer more informed on costs up front.