Why can't the concept of high school be more inclusive?

I don't have every expansion pack - is there much to high school in the game, other than going there, doing homework, school projects and having an acting club? I don't think that's too American, sounds pretty much like my Eastern European high school experience, and I feel it's generic enough to be quite universal.

I think the school customization would be a bit much, it's not a school simulator and it's impossible to have everything in the game.