Also not knowing if disabling it will break the page, something even technically inclined people can't know ahead of time. It's not like push notifications where you would have to try hard to build pages that could break without the feature enabled. I could easily see people abusing this to serve pages over alternate protocols and making people expect to need to click "allow."

It's implied it will break or limit the page; just as denying access to microphone and video has that implication.

No it isn't? Unless you're doing something with the microphone or video there's no implication there.

Sure there is. If it needs hardware access for a function then without it that function breaks.

It's no more confusing than the warning provided for self signed certificates.