Earlier quoted context omitted.
OK. Exactly what about sex work is immoral, when the sex worker can choose their clients? Is it that sex is inherently something special that other work isn't?
The sex workers aren't the ones whose moral choice is in question here; the sex purchasers are the ones who should feel shame and whose behavior is for society to condone or to curtail. Slaves weren't the bad actors in that peculiar institution, either.
Which rights does consensual sex work curtail?