I was saying that something that is relatively harmless becomes bad when it is indulged in too much
... that is trivially true. "too much" already makes it a true statement. When is "too much"? When it becomes bad.
You continue to use other less extreme content in an attempt to justify this filth.
I did no such thing. I am not saying x is ok, so x+ should be ok too. I am saying if your arguments hold true for x+, they should also hold true for x.
Three of your points were:
If x+ is out there, more x+ will be put out there. (1)
x+ is bad and people should be guided to overcome fantasies about x+. (2)
When people wallow in x+, that is bad. (3)
Yes? Are these your points? If so, they are all problematic.
1. You need x+ to be popular to spawn more x+. x+ is not popular. Look at popularity of horror games on Itch to see how that works. They are on page 1 and new ones are created by developers wanting to make a popular game too. It is the popular thing that spawns imitations, not the unpopular one.
2. You assert that people fantasize about it. Then you demand they be guided to overcome this. That is less of an argument and more how you wish the world to be. So I was interested how you apply this wish to other bad things. You did not answer. For it to be an actual argument against x+ you would need to show that people would fantasize about x+ because of a game about it, and furthermore that this leads to actual harm. For all you know someone playing that game might play it precisely to overcome any real life desires about x+. I would assume most play it for the appeal of the renderings and because the taboos and bad things of real life make fiction about it more interesting.
3. You are begging the question by starting with a player that wallows in such games too much. You would need to prove an addictive quality of a thing or something like that to have an argument. Like alcohol. There is danger of addiction and intoxication there. So of course, if someone who drinks "too much" that is a problem in several ways. Or gambling. Playing video games is not known to have similar problems. Besides the trivially things, like overdoing it, but you can overdo anything. Even collection stamps.
So again, no, I am not justifying content. I am critisizing how you argue against the content. Decades ago the content I played was heavily critisized by people not understanding games and fiction. They only saw people playing games where "you kill humans". And they argued how bad that was and called for bans. Mind you, those were popular games. If those type of arguments were untrue for those mainstream popular games, why should they now be true for nieche games.