There are buildings where the doorman sits behind a desk. Perhaps it varies by city.
I thought bellhops do that, that's not just a "doorman"
You're confusing the word "doorman" to include other random unrelated jobs, like expecting the postman to also deliver your milk and then complaining that email doesn't solve that problem.
(I guess if you ordered milk online, he could, but that's not the meaning regular people assume when saying "postman")
No. Coporate fired a bunch and now doorman is doing their work, too.