Prismadw

If you are a Resto druid healing a dungeon and your tank is almost dead, and you are almost dead, and you have fire under your feet, you need to heal your tank, you need to move out of the fire, Swiftmend is on cooldown. You either use Regrowth on the tank while you stand in fire, or move out of the fire and throw a Rejuv on the tank. Maybe you Wild Charge out of the fire and then heal the tank. If everything is on the GCD, that is a decision you have to make. A skilled player can make the right call based on the situation and encounter. If Wild Charge isn't on the GCD, you can just get out of the fire and heal the tank. This makes the difference between two player's skill more about their reaction time. Should WoW be about reaction time or making the right decision.