Some things I would like to point out:Firstly I just want to note that this game maximally associates sex with evil. It's not a minor thing. Demons wishing to destroy the moral core of mankind would be a fine premise. To undermine people morally one should force them to do things that are morally appalling, preferably ostensibly of their own will. What do we get in the game? Women are forced into sexual acts, and little else. From there they start committing actual crimes, murder, destruction, arson, condoning collateral damage, betrayal.
First and foremost, this is a porn game. We uh, kinda need the sex to be a thing. It's sort of the point. But moving on,
Yes, all 'capture' options are sexual. But also, what alternative do we have? This is a forced action mid-combat. The kind of things you can do are pretty limited by the nature of the scenario.
This isn't some super complex tactics game where you can choose what method of villainy you're going to pull off and hatch a evil plan to trick the heroes into doing questioning their morals. You always attack in the middle of the street in a giant fight with a bunch of demons and thralls attacking. It's not exactly a scenario that allows for much subtly.
Also, a lot of the corrupt actions the chosen do aren't sexual in any way.
Take t1 breaks for example. Out of the 4 t1 break actions, only one (service) is sexual. None of the other 3 breaks (violence, begging, hiding) are sexual in any way.
Similarly, of the t3 break actions, only two (fantasize/striptease) are sexual, and even then, striptease is stated to be done by the chosen's desperation to feel useful more than anything.
And while a chosen's recreational actions do have a lot of sexual acts, often, the sexual act in of itself is only shown(or implied) as a part of the reason the act is 'evil' not the entire reason. Not to mention that a large number of them just aren't sexual in any way.
Really, just avoid innocence breaks and disgust on a chosen and you can have them avoid a LOT of the sexual stuff. Try for distortions that avoid innocence and you can easily get a rarely does sexual things of their own violation.
Their magic isn't associated with how sexual they are, it's associated with how their viewed by the society. The game at many points talks about how a certain action will reduce their powers due to societal views, and it never goes 'yeah they do sex so people think they're worthless now' from what I recall. The comments are closer in line to 'It's awfully hard to think of someone as a capable protector when they keep getting captured and raped'. Which like, morality of sex aside, it IS hard to think someone can protect you when they keep failing to protect themselves.Furthermore their magic is directly associated in some capacity with that fact. When raped they're shunned by society.
Also pretty sure the game says the demon army uses sex because it gives the feeling that the demon army doesn't even consider the chosen a threat, which undermines the image of the chosen as undefeatable protectors. It's not just 'oh no they lost', it's 'oh no they lost, and the enemy doesn't even bother to get rid of them'.
I would also like to point out that the game technically doesn't portray the chosen from getting corrupted by sex. Like, yes, sex is the tool used to corrupt the chosen, but the chosen are ultimately corrupted when their hate/pleasure/injuries/exposure is increased to the point where they can't stand it and snap. And yes pleasure is sexual, and exposure is pretty sexual too. But the effects of exposure is humiliation and embarrassment. And honestly this is imo an entire other conversation but I will stand by that it's not a very 'sex bad' stat.
I mean heck, even pleasure, which is just all sex, isn't just 'sex bad' as the entire situation adds the caveat of "this is super not the time to be doing anything other than fighting". Like, I'm pretty sure you can still be sex positive and agree that sitting there masturbating when there's a demon army kidnapping people and attacking your allies is not a good thing to do.
I would also like to hazard a guess that this game is less of statement of someone thinking sex=evil and more of the fact that corruption is a fetish that exists (and corruption of heroes is a very common branch of that fetish), being an evil overlord is something people enjoy from time to time, and sometimes, the two meet.
Like, there are a vast array of porn where the evil organization corrupts the heroes through sex, and pretty sure the thoughy process isn't 'sex is inherently negative and thus can be used as a moral weapon against the good', but more like 'this makes me horny and to hell with how realistic the premise actually is'.