I can't fault anyone for having a visceral NOPE reaction to any of the spheres.
All of them have generic hot buttons, which in some cases is enough.
Each also draws certain negative player types because of some of the themes involved, and the result is equivalent to a chemical reaction that is unique to that sphere and what those players can specifically do in that sphere in intolerable ways.
(Example: The 'must do all the things' player, annoying as fuck normally. Completely intolerable in mage.)
Nobody should get browbeaten into adding spheres they don't want to, full stop, whatever their reasons. It almost never leads to good things and it's not cool even if it was the best idea since sliced bread.