That's exactly what I am saying, some people are helpless, seeing how helpless they are won't change anything since they don't listen to/understand advice anyways.

I'm am not saying it's useless, I think it's a good thing. Although some classes don't care at all. AT ALL. Because they play only BLM for instance. As you said, as Tank you need MP HP PT bars to know when to pull. As classes with TP regen skills you need TP bars too. All classes need MP / HP bars even if they can't do a thing about it because it is useful to know if your team is low on HP or healers low on MP. Well some classes don't need TP bars at all, never ever, it's an information they don't have a use for, really really really with no exception.

I'll materialize your fears : imagine, there is an option to disable TP bars, some people who should have TP bars enabled disable it because they don't care and play badly. Well it's very likely that without the option they wouldn't put up any PT regen skill. As you said, and I experienced it as WAR, people still don't give us Goad and we still need to ask for it.

So let the damn people have their damn option and stop denying others players a comfort that you think is a bad idea because people will make foul use of it.
Why should good players be punished for people who do stupid things ? They always will !