My first 'lazy' healer

[Lastelli]

This just shows how badly healing needs redesign. Healers able to dos longer then heal is odd.

That's not the problem here. Healing requirements are kept very low because whenever a piece of content forces healers to heal more (read as "to play decently") the party or part of it will simply die.
Notorious instances are the vault's last boss and a11 (normal mode), just to name two.