DPS is the job of DPS.

[Rilifane]

I actually had one of those WHM's not too long ago when I got Thordan NM for my Trial Roulette... I had already topped off the party with my own Medica 2 because it's all that's really needed given the pitiful damage in that fight, but without fail they'd constantly be casting their own version or a regular Medica when the party was already at full health. Not a single bit of DPS was coming out either, so they might as well have just stood there the entire time given how much of a non-entity they were in the fight.

Same just now.
Especially sad when they are 70 and wearing mentor crown. Players who are new to WHM will adapt that behavior because if a mentor does it, it has to be right, right?