Im more confused how someone gets to level 60 and doesn't understand their class at all.

How do dragoons/bards get to 60 and not know what Heavy thrust/straight shot is/does?
How on earth do you see BLMs still spamming fire 3 at 60?

Its all well and good not being experts at a class and trying to learn it at 60 somewhat. But not even knowing the basics of a class at 60 is insulting those you are in the instance with.