To be honest this reads as the most uncharitable interpretation of vague statements possible, the only part that stands out as unequivocally bad is them being stuck in the temple until adulthood and even then there could be any number of unknown mitigating factors.
No one is forced, they're free to leave once they're adults, seeing naked women in the aftermath of sex could just as easily be explained by communal bathing facilities, sex education for post puberty teens isn't a weird concept so long as they're not participating.
In a real world setting yes this would draw considerable scrutiny, in a setting where sex is much less taboo in general it hardly stands out in my mind.
The thing is, that they are trapped in that temple, their whole childhood, that their formative years, you know?, the ones that basically give a person the mainframe of who they'll be as adults, are developed in a whorehouse where they learn that exchanging sex for money is something good and desirable, even more, is a religious, spiritual call from their god, who wants them to spread passion all over the world, through more children who'll became whores and so on, forever
Cait was told at thirteen that she had the aptitude to be a sacred harlot and her education reflected that, every tale she tell us about the temple illustrates that doing that kind of stuff is normal to them, what's even more, Calla is seen as an odd element because she's the one who doesn't want to be part of that life, and taking Calla out of the temple together with Cait became a problem for their mom, that she fixed at the risk of her own station. Basically, church-state sponsored grooming
Being free to leave is pretty much an illusion in that setting, after all, what awaits for them outside of the protection of the church?, Calla did so because her dad was a man with power who could do so, despite the problems this created for her mom, and Cait just tagged along and was a problem too, despite wanting that life, something she would gladly keep doing, that's how much control the temple holds over them, that a random hooker leaving is an issue
Imagine what it is for the nameless cat that wants to do other stuff, you know what happen to them?, we have one in the wayfort
Look, I'm not saying that the whole thing should be scrapped or anything like that, the eternal whoredom is part of the game and I enjoy it for what it is. All I would like is for the champion, the vehicle we have to explore this world, to have the capacity to react to it, beyond gushing constantly about everything or being kind of indifferent
No one from that world ever curse the gods, no one rebels against them, why?, are the writers so enamored with their own creations that they can't conceive someone from their own setting, hating them?. The wyld trees are almost a non entity, so diluted that they hold no weight at all, and Tollus does what he does for greed, but the champion is there and is part of the same world, could the champion maybe have a moral issue with thhe gods?
Let me roleplay in this roleplay game, that's it. Give the champion the chance to tell any of the seven that maybe, they are wrong