Dark Knight

[Ragnirok]

snip

You've basically picked and chosen points out of a wiki that support your argument. If you go back and actually play the games you'll see that every single DRK job has exceptionally high defense. On the point of soldier the class that doesn't exist in any game whatsoever save for maybe a splash in tactics. In every other game its defined as a generic character who is usually only temporary. Unless of course you mean Knight in which case we have that already. It's called Paladin.

There are good arguments for having it for a tank and as a dps. But why dilute the game with something that has the potential to be a tank (with a 2 handed sword even) that way we can make way for things that are guaranteed to be dps (ninja, red mage, anything else). DRK, and SAM are both instances that could be potential tank jobs and leave room for other things that can't (or shouldn't) be a tank.

You can say that the job was focused on dealing damage but guess what? Every job pre XI was focused on doing damage save for the ones like whm that were dedicated to healing (holy, and summons aside). This is because there was no trinity in Final Fantasy before XI. Why shouldn't a high armor high health target be used as a tank? Just because they aren't proficient in shields doesn't mean they can't tank. See MRD/WAR.

So again i reiterate, why saturate the already heavily saturated dps pool with a job that could be used as a tank?