You're absolutely wrong. The point for a game is to provide context to the porn. Story and situations is what makes it the best. Context gives you all the stuff a simple video can't - buildup, dialogs and interactivity. What you describe is no different from browsing r34 - there's plenty videos of characters you may care about from better games. But it's not even nearly the same as having an actual porn game involving those characters. It's like comparing hentai art to a doujinshi with a story - the latter is a completely different and more complex expirience.
Except most porn in porn games is largely unrealted to the plot, and is simply a reward for beating some random fetch quest, or something similar. There is about as much "context" to porn in most porn games as "step bro I got stuck in the dryer" porn movies have. Like a lot of the sex in Rance is "I defeated you in battle, now I will rape you becuase I am Rance and that is what I do!"
Games that do try to tie the porn directly into the plot get mocked because of how bad the writing is. Look at Summertime Saga, its the porn game with the most patrons of any porn game out there, and is the third most patroned project on Patreon. I have never once seen anyone actually claim to like Summertime Saga's story. The only thing people enjoy is that some of the girls are hot, and they want to see them get fucked. In fact, every time DC tries to do a story update there is collective moaning because it means one less update where we aren't seeing the girls people care about getting new scenes. The only time there was any praise of SS's writing was the Roxy update, and even that was only "in relation to the rest of SS's writing this is good".
The same is true of things like Milfy City, Being a DIK, Good Girl Gone Bad, and especially Seeds of Chaos. People just shit all over those games for awful writing, unlikable characters, and the devs extending plots out for
years, instead of actually letting us have sex with the girls. The devs know no one cares about their mediocre melodrama, and just want to see the main girl take it, and the moment they do everyone is going to bail because that is what they are there to see. So they stall it out to rake in the cash. And Seeds of Chaos has its own problems where getting to anything requires reading the whole Lord of the Ring trilogy between each scene.
Now compare to FOW's movies. They barely had any context or plot beyond things like "demons are invading Tokyo and raping all the girls!" like the Kunoichi series, and FOW was by miles the biggest SFM/Blender animation group on Patreon because of it. No one cares about the plot of Kunoichi, they just want a bare bones premise for putting the girls into situations to get fucked.
The same is true of the vast majority of doujin. Most doujin are like 30 pages long, with a "step bro I got stuck in the dryer" type plot. The ultra long form narrative ones are the small minority, and most of those don't turn out well in the end either.
subverse provides the context it needs to. They are in a galaxy ruled by an anti-sex opressive empire, and all the girls are massive turbo sluts wh ofuck anything, so here is some explanation as to where all the things you can see them fuck come from.