Actually, that's exactly the problem.
People are just mislabeling it.
As a healer, once your party no longer needs healing, the only thing left to do with that gcd is to deal damage, or to not be useful to the group.
Every gcd should be used on a skill that's useful for the group.
Overhealing is not useful.
So, when people see healers not dpsing in content, what they see are healers either overhealing(not useful), or just idling.
The community just has latched onto the 'dps must be done' as the go to problem, when the actual problem is people not using skills and being helpful to the group.
