Is “good morning” a wish or a greeting?

Are people wishing you “good morning” to better your morning? Maybe in the hopes that you don’t go postal from the crazy commute, the ungodly hour, the allergens attacking your body and the fact that your Egg McMuffin…the only thing you fucking wanted this goddamn morning, just one Egg McMuffin…was runny. And you didn’t goddamn find out about it until you were at work and glaring as the white ooze dripped onto your desk. Huh? Is that why you wished me “good morning” you perky asshole? Well, I got your “good morning”! I got it right here!! Let’s talk about the morning, shit-head! Let’s talk about muffins and benadryl and….huh? Oh.
You were just dropping off a bagel for me? Oh. Well, thank you. Um. Good morning to you, too.

** – yeah, I know its not spelled right.