We've discussed this before. But this is a new expansion, and a new crop of players seems to be playing it, and I just had to berate a holy pally in Zul'Gurub for like 15 minutes about how he doesn't want the Hakkari Loa Drape that just dropped because he doesn't need the hit rating on it and he should give it to the elemental shaman instead -- and did I mention it took 15 minutes to convince him of this? Needless to say, the run was long, yeah, and lo, it was also full of wiping.
So the facts are these: The game has been out a long time, but the playerbase is constantly rotating. It may be hard for old-timers to accept, but even the most basic of gameplay concepts still need to be explained, and ignorance of a thing doesn't constitute a bad player, necessarily -- just a new one or one who is returning after an extended absence.
All of this is the long way of answering the many emails and comments I've gotten lately about hit rating, its importance, and whether or not mages still need to worry about capping it.
The short way? Cap hit.