But OP was fine with letting the rest of the group run ahead.

Honestly, unless you were both tanks; that healer really was just being a jerk. You don't need 2 tanks for CM. It's usually 50/50 whether the off tank even grabs the adds in there when they go chasing the healer.

The only place I could possibly see it being an annoyance is right before Livia. But that place is generally a clusterfuck anyway since no one ever pulls back to canons anymore (which are often destroyed anyway).