Healers that don't want to DPS are like DPSes who refuse to move out of AoEs.

[Taika]

May I ask what keybinds people use for their dps abilities as healers?

I'll also chime in that I've found it best to use a MMO mouse (I'm using Logitech G600). On all healers, I have 1 action bar row tied to DPS skills (1 is Cleric Stance, the rest are DPS spells). I use them with clicking the third, right side mouse button (bound as "Shift") with my right hand ring finger and use the number buttons with my thumb. For healing, I use the same thumb buttons but don't click the ring finger button.

If your tank is under 50% hp and your doing it wrong.

A good healer minimises their healing while keeping all party members alive. When you use as little resources as possible on healing, while still keeping everyone safe (and yes, even 10% tank HP can be safe in some cases when you know nothing can crit them to death), you have the maximum amount of resources to spend on more effective contribution (DPS in the case of how this game works). If someone dies, then it's a mistake, of course, but the more skillful and effective the healer is the lower they can let people drop while still keeping everyone alive.