Tapping fingers to click is enabled on the current quest fwiw, it's just not the default since typically the default is to use controllers.

The thing the quest is missing is eye tracking, I'd guess because of the cost - but that eye tracking is going to be a really big deal for good UX I think (along with the much better latency).

Meta also has the issue that because they're targeting social (given what the company is) the value isn't really there unless all your friends have headsets too (outside of the gaming niche). This is really hard. Apple by focusing on the utility for an individual side steps this in a way where it's a lot easier to bootstrap imo, especially with the ability for them to rely on their existing platform.