Except that NIN CC is worse than that of almost every other job. Again, I'm not saying it actually needs improvement. As far as I can tell, it's fully functional. But it's not equal to that of the other classes.
Are there situations where Hyoton could save a life (or group)? Sure, but there are more where Tri-disaster could.
Is it less of a sacrifice to have the NIN silence instead of the MNK? Sure, but that doesn't mean the MNK doesn't have a stronger silence.
I'm saying that NIN's CC ability, while fully serviceable, is less than that of the other classes. Is it unfair to compare it to Shield Bash? Maybe, but if I wanted to be really unfair I'd compare it to Holy.
The reason that DPS classes don't usually CC is because, in the cases where CC is essential, tanks and healers often provide better CC. Stuns? Let the PLD or WHM do it. Blind? Let the PLD do it. Silence? PLD/BRD rotation. Bind? SMN. All that's left for the NIN/MNK/DRG/WAR/SCH is to be ready in case someone screwed up. Yes, the NIN has more flexibility, and is less likely to lose DPS either way, but that doesn't actually address the *power* of the CC available to it.