Providing good sex is a skill, whether it's paid or not. There is no reason to stop a woman. or anyone, who freely chooses to sell their sexual skills from doing so. The notion that a woman needs to be protected from her own choices is patronizing.
Question's kinda rhetorical, in the sense that the answers are rather uncomfortable to capitalist socioeconomics and the beneficiaries thereof.
There's a weird double standard around "love is love" for women. No one is concerned if an adult male has sex with a substantially older partner or engages in sex work, but if a young (adult) woman dates an older man or decides she wants to be a sex worker it's considered fraught.
This is a relic of the patriarchal order that many feminists still cling to.