I get the Magia Vander are suppose to be egotistical, but why does some of their ego border comedy?

Like when after Will has cleared out the golems of the Bloom multiple Magia Vander scout him for their faction, including the Fire faction. But then the glasses guy starts to point out the flaws of a non magic user joining the tower and the fire guy agree. Like bro you just scouted him for the fire faction. Why did it take someone else reminding you Will couldn’t use magic for you to start talking down about him?