Well, not trying to be mean, but jobs change quite a bit depending on level. You (OP) may know how monk plays at 34 but the job is very different at 60/70/80. So in a sense until you have the full kit of a job, you can't be said to fully understand it, at least in my opinion. I'd go so far as to say one needs a job of each role at 80 before they can attempt to say they understand how the game truly plays since then they'd have exposure to all variations of responsibility.