If she's safe, successful, healthy, and doing it of her own free will then why not be happy?

That would depend entirely on her circumstances. Is she a professional helping disabled people like my example above? That's laudable. A self-employed dominatrix with a select clientele? Sounds lucrative. A popular OnlyFans starlet just making some money on the side during her studies? Clever. Participating in explicit forms of BDSM porn? If she does so of her own volition, with the consent of all parties involved, for a fair pay and without lasting harm? Cool as long as she's working with professionals with a good reputation.

In all of those cases I would council her to the best of my abilities on safety and long-term planning, if she'd let me. And of course, as any parent, I would worry about her safety. But hey, I'd worry if she went paragliding or mountain climbing too.

Honestly, I would be more disappointed if she became a lawyer in the pocket of, say, Amazon or AirBnB. Or a politician for some extreme right political party.

Would I be happy if she was a sex worker in some seedy part of town with a pimp hovering over her? Of course not. But that is not dismissive of sex work as such, rather of exploitation and coercion. All of the examples above avoid that.

Well said, and unnecessarily downvoted for such a thoughtful comment.

Would I be happy if after the education I paid my daughters they decide to work in public sanitation?

Think honestly about it. Do you think I have anything against sanitation employees?

Bad comparison.

Public sanitation workers keep our society functioning, they're a cornerstone of civilization.

Online prostitution, on the other hand, ranges from providing 0 value, to extreme negative consequences, such as the current porn addiction epidemic, or the loneliness epidemic.

The GP, trying to show how 'bad' profession A was, was making the argument that the average HN reader would look badly on his progeny participating in profession A. I simply made the argument that the average HN reader would also look badly on his progeny doing profession B. Obviously, my point is not to throw shit on profession B but rather show that GP's argument simply does not work.

The fact that you think profession B > A only reinforces my point and shows, precisely, that GP's argument does not work.

Your moral compass is truly fucked. One makes a mess of their own life and contributes to making a mess of many other lives. The other cleans up messes.