I gonna disagree with you here.
I support both things and have dedicated patreon pages for "light" and "dark".
But harem games are kind of fucked up, if you spend more than a second thinking about it. While ntr games feel fucked up without thinking about it and are less evil if you take the second to think.
This only applies for each one personal preferences tho. I mean I read many Light/Web Novels and I can say honestly that I can take your 2 sentences and reverse it and we would be wrong and right on the same time lol.
There are many factors which play in what makes Harem/NTR great or bad and I honestly must say is that despite both genres, the harem makes more sense tho its not always means its more realistic. But then again, there is a reason why Harem is more popular or why people tend to escape from realtiy into Harem/NTR stories.
Ntr can be a triangle, with one person suffering. Harem in reality has many, many people suffering.
And that at some point dark evil shit would be necessary to get number 4 into your harem, is obvious.
I am not talking about the games that exist, but the tag that demands it.
No man they dont have to and in all what I saw, played and read non of them did. Except you count the "drama" which only was there for either "drama" or to bonder their relationship. I mean you yourself say that in a specific genre like NTR you can have something "good", like your Douche becomes good and loves the LI and the LI loves him etc.
But this clearly counts to the whole Harem member logic of them bonding and loving the MC without starting each other backstabbing or killing each other.
Obviously you can make games where everyone is "magically ok" with what happens. Again, just don't turn on your thinking capabilities if you have any.
I mean, what you count as "magic" for the Harem to work, so the others will say as "magic" so your Wife loves the douche and he her. Its all about the writer preferences and his writing skills. Its clear to me that you like a good NTR story and thats good and all. But did you read also good Harems where Each of the Harem members trully works as a unit ?
I think from the conversation here, or like you saw it on your own on other threads, NTR is like Harem most of the time cheaply done so you have to dig through much trash.
But if you stick to one thing then the other then its your own personal preferences in the end.
But from another side. Who said it's not ok to have fun with a corrupted storyline? As long as you can separate it from your real life, you'll be fine.
No one said that honestly, at least not from what I saw. It all depends who you ask or WHERE you ask. From my experience if you want to add "corrupted" in a basic vanilla story of MC x FMC alone, you will get hated and cancelled because its not mix well. Same goes for "Harem" and adding "NTR". Look what happend to "Lust Geass" lol.
Its the same when you want to eat something Halal but then the waiter is confused because there is some small meat of it, he is just making a fuss.
Personally I enjoy corruption stories/games but only when its the MC doing it. Hence I love when I have them, aka netori. But thats not what you really mean.
Harem and Ntr are vanilla things.
Now what made you think this is the case lol. I mean you saw how each others fanbase go on other throat lol.
The others you mentioned tag is because they are not the majority but are niche, at least on this forum. Go on specific sites where this specific genre is talked about and then you would think the whole world is upside down.