It's not about knowing the job better. It's literally about taking a minute to examine others and determining how you should pull. Even if the tank's geared up in the 90s, if the healer/DPS aren't geared well enough, pulls will have to be adjusted. I saw this first hand when a tank tried to do a speedrun in Brayflox HM. Whilst I'm decently geared for it, my friend, a monk, was barely out of his AF gear (had enough pieces of other gear to make it into the dungeon) and the healer was probably not too far ahead of him from what I can remember. We wiped. He got pissed and left after saying they both sucked, rather than adjusting pulls.
