Are you talking about below fifty or above fifty.

If it's below fifty than from where I stand, that's just silly. I have played every job in leveling dungeons on the way to fifty with the best jewelry (and sometimes not even as good) being the stuff that you start the game with... because I wasn't going to waste gil or time to get jewelry for classes on the way to fifty when it's unnecessary.

You can manage to do your job in the leveling dungeons and "get through it"... also some times people don't know (I actually had a friend think fifty below caster gear was what they should be wearing since they wanted higher magic defense even though they weren't a DoM). Even if you encounter that teaching and not kicking is always the best thing.