Question to healers

[odie]

I have been noticing that more and more healers are letting the tank stay at lower and lower HP so they can DPS. 50% is fine. Most dungeons don't have attacks that can kill a half life tank. 20% and less is what I'm seeing more of.

My question is why? I want to hear the points of view so I can understand.

(Note: that very rare times I'm watching the tank die, very rare)

I am very confident in my healing ability. Sometimes I take a moment to gauge the damage the tank is tanking in duties i'm very familiar with to get an idea how far I can let them go. I'm not trying to make you crap your pants. I'm just maximizing the time I can stay in Cleric before coming out of it to top you off again. It's probably scary when you don't know your healer, but most of us have healed long enough we know how far we can let you get down to.