The point of TM is utility, and if you don’t have it you’re losing access to a substantial amount of your toolkit as a warrior and as a tank.
-It seems like your biggest go-to move when you lose threat is taunt>sunder. What do you do if your taunt is resisted and challenging shout is on cooldown? Without TM you can’t use mocking blow, or intercept stun to give breathing room before taunt comes off cooldown
-If sheep breaks and the mob is casting, without TM you cannot intercept stun to prevent the spell from going off.
-Without TM you can’t intercept the pat that everyone missed that’s trained on the healer all the way in the back
-Without TM, you can’t thunder clap on bosses/hard hitting mobs
-Without TM you can’t hamstring running mobs when all dps are focused on other targets
-Without TM you can’t use pummel for the extra interrupt
TM provides a ton of utility that helps runs go smoothly. Without it, you’re limiting yourself to just having mobs beat on you, when as a tank you can do so much more. It’s not just pressing buttons when you’re using tools that make things easier for the group.
All these things are situational, but doing them saves wipes, reduces stress on the healers, and makes it so mistakes from other players dont wipe the group. I always considered that my job as a tank is to make the run go as smoothly as possible. Without TM, I can’t do the little things that my class was meant to do. With TM I can do everything you do, plus so much more.
Learning how to properly stance dance early on is important for all warrior tanks.