I mean, in a perfect world, sex workers would choose sex work because it's work they wanted to do. However there are numerous factors that complicate this:

1) The existence of sex pests like Andrew Tate who openly recruit and exploit young women into working for them as adult performers

2) The socio-economic realities of where a given person grows up and is raised in, which greatly affects their prospects in life in general which may artificially make sex work a more appealing option

3) The overarching threat of starvation which may force someone with literally no other options to do it, lest they end up homeless and freeze to death.

This is where some feminists and "anti-porn" activists have problems with it, because in an exploitative system that demands you work in some way to survive, there is an argument to be made that no sex work can be truly thought to be entirely devoid of some form of coercion, and therefore the sex involved in that sex work cannot, in turn, be entirely devoid of coercion, which makes it, by definition, rape. I don't particularly subscribe to that belief as I believe it trivializes the free will and agency of performers, but like, I also can't entirely say that it's incorrect. I see the bones of the reasoning and it does make sense to me, and there surely are a ton, an absolutely stressful amount of sex workers out there right now, who are doing it because it is the only path to a decent quality of life available to them (or worse, their sole method of survival due to systemic or more direct threats). And if I found out a given performer who's content I enjoy was one of those people, I can't say I wouldn't be uncomfortable with it.