Originally Posted by
dragonseth07
The mentality comes from the fact that there's no good reason not to optimize everything in this game. You should do everything you do to the best of your ability. And since everyone does damage...
Follow me for a sec, let's look at Royal Authority. You sacrifice the enmity from RoH for a lot more damage. Why would a tank ever want this? Because enmity doesn't help past the necessary amount. If I have a 50,000 enmity lead because all I use is RoH, I could stop attacking for a LONG while and not lose hate. Using RoH at this point is wasteful. It's suboptimal. RA is a better use of cooldowns, because it helps the group more.
It's the same with healing and DPS. Wasting time and MP from overhealing is suboptimal. Not using a GCD is suboptimal. So, it's clear what you should do.