Main healer here who also has a great deal of empathy. By that, I mean I can relate to the ‘human condition’, thus, if someone in my group has a healthbar that is lowered, I ‘feel’ just as anxious as if it were my own healthbar.
I would be far too anxious if I allowed health bars to fall below 50% w/the exception of the boss fights where it is expected that a player or players will get chunked down.