It's because there are a lot of people here obsessed with reaching the largest possible audience they possibly can. And since every brother and their mother are on mobile, or, at least, a web browser...

The way I see it, mainstream masses are finally (FINALLY!) leaving the world of desktop computing behind, so now it can return to the nerds and people who just wanna do shit

I think that web app benefits vastly outweigh the constraints. Distribution is easy (give people the URL), the app is always up to date, and it's cross platform. Unless you absolutely need the features and/or speed of a device, you should seriously consider a web app vs. a not web app.