Damedame na Boku ni Maiorita Zen Koutei Mama Megami!

do what I do when I see stuff I don't like. block that part of the screen with your hand and hold the CTRL key.

trace it back to early games and you'll see why.

I think it's more about playing it safe. It's very simple to make a story around high school students. Personally, I like it when they take risks with the story, and I enjoy it even more if the main character has finished school (I find it easier to put myself in their shoes that way), but a high school setting is basically taking the sure route. Rather than risk a setting that no one enjoys, it's much easier to use a setting that pretty much everyone has gone through. Don't get me wrong, some people really do prefer that. But it's also the reason why, when a game can either stand above others despite a high school setting, or when a game has a truly unusual plot that doesn't revolve around school, those games tend to get noticed and become instantly beloved.

But most prefer the safe route. Making a mediocre product that's a guaranteed sell is less risky than trying something different and bombing it. Modern Japanese anime/manga/VN media is really bad for playing it safe. That's why in the last few years every other anime has been the same Isekai plot recycled for the 40th time.

its more the culture of japan. from the last year of high school which is all about either finding a job or getting into a college people have very little down time. if they go the college route college is all about the studying then they go to work where its constant overtime being pushed around by higher ups its depressing and no one wants to play a game like that. its even worse if they go the job route its a huge contributing factor to the high suicide and low birth rates in japan