It doesn’t do better while tanking because you can’t stance dance at all.
Fury is great for leveling on a PvE server or if you run away from every fight, but to say since you spec fury and do fine it’s “better in every way” is hilarious and wrong. You lose like, all the utility that makes Warriors so strong in the first place. Sweeping Strikes + Whirlwind, stance dance for taunts and mocking blow without wasting rage left and right. Fury is fine, but “better in every way” is a bit of a bold claim my friend