Loomis, Proko, and the rest are all meme answers (but correct ones) to meme questions.
You see if someone asks "How do I draw?" Someone replies with "Loomis." In the same vain as
>What do I do to bulk as a first timer?
Because you see no one already invested in art asks this. Everyone who does not know what to do or what path to take is told to that because it's just what works, but no, for anyone who takes art seriously, they won't even know who Loomis is until they get on the board in the first place and discard him. No one outside of /ic/ will mention him, and everyone who will make it does not view him as a teacher. This is going to come off as extremely pretentious but it's true.
If you don't know how to draw do Loomis because there is a 99% chance you have no goals or creativity of your own to send you forward.
If you know how to draw you don't need Loomis.