Sex work is a perfectly fair job as is any other but sex work, like all work, is almost always through coercion. Even the people who actively enjoy and seek out a particular field can not escape that they can and must still answer to their customers and financial backers demands. For example many NSFW furry artists might start out enjoying their work but then a commission for a scat image comes in with a lot of money and they feel compelled to take it, even when it disgusts them.

Some of this is ultimately unavoidable no matter the society because someone has to do the work and they're gonna want things in exchange for it. If I spend all day picking apples, I'm probably not gonna be happy giving them all away without anything in return whether in a capitalist system or a communist one. But recognizing it as inevitable (to some degree) does not mean dismissing that's still an issue either.

Sex work should be respected as any profession is but there also needs to be a strong social safety net because nobody should be forced into selling their body if they don't want to nor should they have to sell their body in a way they don't want.