Is DPS'ing as a Healer Vote Kickable?

[Watachy]

Also, I still haven't gotten an answer as to why we queue as tank, or dps, or healer.

Every role provides you a different gameplay like every job. The thing is, casual content (everything out of Savage runs) has been designed in a way you don't need to heal 24/24h and this applies to some Savages turns too.
If you're aren't healing you should be doing something else that ain't slacking around when your party members are trying their best to clear the content for you. Since you've got 3 things to do as a healer: healing, pre-cast incoming damages, dpsing.
If no heal is needed and nothing big is coming, you have to DPS that's all.

[Zojha]

If no heal is needed and nothing big is coming, you have to DPS that's all.

Or more generally put:
Don't stand there doing nothing productive when you could be doing something productive instead.

In that form, it can be applied to tanks and DPS just as well - a tank shouldn't just build an aggro lead and then /mandervilledance until the DPS catch up. He should keep doing something in the meantime and ideally something efficient. Likewise, a DPS should not be content doing its role by autoattacking, but rather supplement that damage via skills when they become available, ideally in an efficient way.

To me, that rule is pretty much common sense and role-independent.

[Taika]

Or more generally put:
Don't stand there doing nothing productive when you could be doing something productive instead.

In that form, it can be applied to tanks and DPS just as well - a tank shouldn't just build an aggro lead and then /mandervilledance until the DPS catch up. He should keep doing something in the meantime and ideally something efficient. Likewise, a DPS should not be content doing its role by autoattacking, but rather supplement that damage via skills when they become available, ideally in an efficient way.

To me, that rule is pretty much common sense and role-independent.

This, exactly! For a healer, this means covering the healing requirements of the duty and then, when you cannot meaningfully contribute by healing anymore (without overhealing), you should contribute by doing DPS! This is the baseline. Only healing and not doing DPS does not reach the baseline. Optimal play would be taking this one step further: using your abilities in a skillful manner that minimises the time you need to use on healing (while keeping everyone alive) and pushing as much DPS as you can.