I never understood why browsers don't ship with more fonts, especially Chrome.
It's good because we could stop caring about FOUC and friends, but it's bad because it would give Google even more power over the web.
The problem that web fonts are addressing is that you have the same font across all platforms, so if some OS ship with additional fonts we'd be in the same position as before: Not everyone will have this package as part of the OS and you have an inconsistent look again.