That's cool Tinari, about being the "weirdo" (spontaneous would be more realistic).
Well, I don't really talk about anything unless someone asks before, but at least 2 of my friends are aware of Touhou, but simply don't play it because, well, more than 9000 bullets in the screen doesn't sound very nice for them.
In the end, it all goes down to playability... Most people aren't willing to play a game with thousands of bullets in the screen and only one hit per life.