Why are they better? I'm developing for browsers, and it runs amazingly well. I wouldn't know how to build such a thing natively (for one thing, it layers on top of and syncs with music videos), and wouldn't have bothered.
There are tons of web apps, games, etc that "people want." Maybe you don't want them, but other people do. Even HackerNews is more than browsing, since you can post to it.
I get that some people want their browser to do a very limited subset of the things that a browser like Chrome can do. I don't think that is actually the view of Mozilla, but if it was, and they actually advertised that, I suspect they'd have even lower usership.
So I should develop my creative app as a native app because it needs hardware access and browsers don't support that. And browsers shouldn't need to support hardware access because app developers should just build native apps.
Maybe you should try my app. (try it at https://pianop.ly/grid.html ... it works ok in Firefox in "player piano" mode)
All the other stuff other than MIDI, browsers support just fine. (including one critical thing, ability to embed, synch with and overlay on top of youtube videos)
Browsers support an awful lot of things, because people want that. I can tell you with regard to my app, I highly doubt a single developer could build it as a native app that was available to as many people.
There are tons of web apps, games, etc that "people want." Maybe you don't want them, but other people do. Even HackerNews is more than browsing, since you can post to it.
I get that some people want their browser to do a very limited subset of the things that a browser like Chrome can do. I don't think that is actually the view of Mozilla, but if it was, and they actually advertised that, I suspect they'd have even lower usership.