It is true that "there are slums so you must have prostitutes in the game" is a poor argument. The reasonable argument is "i want to see tits" and TTON is a complete failure in that regard because pandering to a certain demographic is apparently worse than pandering to another.
Rads gets it. It's perfectly valid to say "I want to see tits", but no one dares to say that. They're saying dumb things like "but realism!" and "but there were skanks in PST!" neither of which is a sensible argument because there are many other departures from realism and the Planescape setting that no one is complaining about. They just like looking at skanks, it would be fine to say so, but they don't have the courage to.
Also Zombra is teh dumb. There are doctors in the game who could definitely double as dentists.
Haha. I haven't played TTON yet so I didn't know. I imagine one could easily name a dozen realistic professions that aren't represented in the game, though. Does it have accountants? Political economists? Firefighters? Street sweepers? Meter maids? etc. Yet you don't see threads demanding
Where are all the telephone sanitizers??