This.
It doesn't matter how many jobs that can tank are available. If nobody wants to play that kind of job, you're still stuck with a deficiency.
That on top of the fact that SE is forgetting major things, mainly
1. Utsusemi is the biggest damage negation in the game. If the job doesn't have this or is unable to sub it and still keep good hate, they're instantly knocked down a peg in terms of how good of a tank they can be.
2. Shield Skill/Defense/Vitality. If they don't have Utsusemi, they'd more or less need a LOT of this. Defense/Vitality helps but doesn't do near as much as a shield proc, and without this, it knocks down how good of a tank they can be as well.
3. Parry Skill. Stops damage entirely, kindof like a random Utsusemi proc. Can be decent for damage negation but doesn't proc nearly as often, thus making it somewhat less useful.
4. Evasion. Doesn't do a whole lot, but it can help a slight bit. But if it's B or lower, just about anything EM+ is gonna hit you no matter what.
5. Guarding/Counter. Good if it works. Usually doesn't.
6. None of the above? You're definitely not suited to be a tank.
That being said, if SE's gonna make a new tank, they better do something better than a B-rank evasion job with no defense/vitality that relies on Guards as well as such poor melee capabilities on their own that they have no point in subbing NIN for that sake either.
