Edit to add my opinion so I’m not just replying “I agree” to 90% of comments. I think it should be legal, properly regulated, taxed and viewed as a profession. I haven’t personally engaged in it but I have no moral objection to it. I do hate the common sentiment that it was the individual’s “only option” though.
It’s very common but also very disingenuous to conflate sex work with human trafficking. While the connection certainly exists, it’s basically caused by the prohibition of sex work, rather than by sex work itself. By pushing it underground, you attract criminal elements, which is where the association of sex work with crime comes from. Fighting human trafficking is a very thorny problem but criminalising the victims never helps.