Tanking is easy. Healing is not much harder. so WHY does it have to be so difficult to do passable dps in this game?

My warrior easily outdpses my black mage in ex trials becuase black mage has to juggle a short timer with a fairly complex rotation, while white mage can do about half as much damage by spamming ONE button!

If anyone can offer advice or help I'd appreciate it becuase I'm about ready to give up on dps in this game. definitely not the easy job it's made out to be, dps should be commended on their dedication and months of practice they put in to get that 3k+ dps.