Sex work makes sex more accessible to men who don't have much luck getting it the conventional way. Usually its men who try to convince women to sleep with them, not the other way around. How do they do this? By trying to stay in shape, making money, spoil their dates, learning to be sociable, etc etc. This a power women have over men, they know that if sex is on the table, they can very easily get all the attention and be spoiled as they want. Well, what if some of those men, who are just looking for someone to spend a night and don't care about having a relationship, could just pay someone who is willing to do it? It's probably cheaper than dating, faster, easier, and you can literally PICK which girl you want. This takes away power from these women, no longer do men need to spend tons of money on dates, gifts, going to the gym etc, if they can get their needs met by a sex worker. And I think a lot of women feel angry when they see a man which they wouldn't sleep with, sleeping with a girl who is attractive, even worse, when the girl is prettier than them. They feel as if he doesn't deserve it, unless ofc he was rich and was spoiling them, only then was he "worthy" of fucking someone hot.

TLDR: sex work means that simps could just stop simpin' and finally have sex. Which would reduce the number of simps paying opportunistic women for dates, giving them attention and buying them gifts.