Honestly as much as it would be.....a slightly useful tool...no dummies can match the real experience of running a dungeon.
Healers learn to heal by trial and by fire. Get with friends...and just get going....its the best way...no substitute for dummies.

Even then....go out in the over-world and camp fates...heal outside them...see how much an impact you have....

I Stalker heal as well - follow someone..just patch them up as you go...you'll figure it out what works and doesn't.
Honestly I'd rather be able to test limit breaks.