Is DPS'ing as a Healer Vote Kickable?

[Zojha]

Assuming all 4 members of the party are achieving their primary role, a duty will succeed.

I don't think that successful duty completion is a very good standard. Consider, there are 90 minutes on the clock. If successful duty completion was the only criterion that mattered, it would be perfectly okay for DPS to deal so little damage that it takes 85 minutes to complete the dungeon. They do their primary job (dealing damage), even if not very well, and the duty does not fail, so according to that criterion, it would be acceptable.

I think it is obvious or should be obvious that this is of course not acceptable and consequently think that this is not a suitable standard to measure by. A suitable standard should not lead to undesirable results if applied to other roles.