The only reason I get annoyed with Tanks who do that is SCH doesn't have an AoE stun like the other two healers to deal with this exact issue. If they had that you could get a bane off, followed by a later excog to get the second one, and not run dry on mana trying to keep them up with adlo/physick spam. It's compounded by the fact WAR's tank stance doesn't affect Lustrate or Excog in that specific example.
It's their one weakness. Crowd Control.