You know, as stupid as this plot is, I do recall in WoW getting kicked out of parties for not using a mainstream build. People get personally offended by that. I was even kicked out of a guild once because I used mana seals on a Paladin in BC.
But yeah, it's not like I started conversations with, "Hey, I use Seal of Wisdom, how do you feel about that?" Most groups were more than fine with the numbers I put out.
MC is an idiot.