Right, Monk can, and that's what makes Ninja CC less viable for this turn? Ninja's can at least contribute to the silencing duty, while a dragoon cannot. And ninja's can solo silence Turn 9, here's your example.
On the contrary, I could say I have cleared Ifrit HM without stuns at all. Your scrub encounter experience is too player influenced, rather than mechanic or class related and holds no value.
And likewise, how Ninja gets outclassed by ONE class, Ninja outclasses TWO on the DPS category.
"Immediately". Prior to the nerf, if the binding effect is applied after the petrification ends, at least one healer always dies here due to build up enmity due to binding delay. This "immediately" you mentioned will result to another death and it's very likely it's the other healer due to build up enmity. So this "immediate" binding effect you mentioned will result to one death, if not more.
The only instance where 3 would be true would be pre-nerf Turn 7. Which is simply laughable now. And the thing about 2:
All casual, or casual-made content like BCOB and SCOB, can be completed with zero crowd control abilities. In harder content, which would be FCOB, CC is completely irrelevant. Even in SCOB Turn 4 before it gained echo could have been done without silence.
Mention of tanks in those replies were relevant because Paladins is the only class out there that suffers from switching oaths. Which was necessary to underline the fact that ninja's can freely switch poisons. Monks would be a bad comparison in this case because they are free to switch stances like Ninja's.
The "tanks" mentioned here would refer to warrior. Which follows the same mechanics as the "restriction" you mentioned yourself. Still relevant.
And it's still perfectly doable without Holy or Shadow Flare.