Sure Fire Mage required a tank to pull for them, but that really wasn’t a hinderance in anyway shape or form. It just required some pre-planning at that point. FM’s were still packing out a lot of damage anyway, more so than they do now, after Flame Patch got unnecessarily nerf.
It’s just that they had the ability to do ALOT of damage and burn down every other pack of mobs. If you felt playing around that ability at the time a hinderance then, that’s your fault for not taking advantage of it.
Frost and Arcane were generally pretty low performers. You’ll always meet the elite player who knew how to play the spec inside and out and would perform better, but those players really are few and far between… it’s definitely no shame to not be one of those players.