[srbloom]

I think two key parts of what you said are "most people" and "normal people". This normativity is taken for granted here. Preference for terse messages is ultimately a matter of taste and I've yet to see evidence that one belongs to a clear majority.

[eropple]

It may not be a clear majority of people, but it's pretty obviously a majority of people who set expectations in public discourse. That's why it's normative.