In a perfect scenario where no errors are being made, certain things do apply and remain true. But for practicality (running with people who dont diversion as often, accidently making a mistake in an opener, gear differences, etc) it is worth noting that if you have to do something, you do it. While it should be encouraged to do the correct thing, people arent perfect, mistakes may happen, and understanding that if it comes down to it and you gotta spam the aggro combo, then thats what you have to do. It's not ideal, by no stretch of the imagination, but as tank, you gotta do what you gotta do to do your job. As a point, lets say you made a mistake and over cooled down, so youre missing a CD. For a tank buster, go to grit along with your remaining CDs. Is it ideal? No. Will you die? Maybe. But sitting there saying "Welp, made a mistake, now it's better to just straight up die than use what I have left in my kit and trying to make do to continue." Or if a healer makes a mistake and dies, using your CDs or Grit differently to reduce healing required so they get back on their feet. Etc etc.

These arent perfect solutions to a problem, and are incredibly unideal, but it's more about if the mistake happens, then you gotta do what you gotta do to make it better. Practice to do perfect, but be ready to adapt.