Is there any reason to play any tank other than PLD?

[Greven]

PLD: paragon tank, more defensive skills + block rate, easier rotation and can heal self and party. Holy knight theme
WAR: brings slashing debuff, more complex rotation, nice burst and good with self-sustain. Brutal barbarian theme
DRK: strong magic defense skill, shield for self or party, good with AoEs and more skills over combo play. Dark edgy theme

after 4.05 nerf/buffs there isn't much of a big gap in tanks DPS https://www.reddit.com/r/ffxiv/comme.../405_tank_dps/

So some random reasons:
- If no SAM/NIN a WAR must be there
- a PLD/DRK is nice to have for Intervention/Cover/The Blackest Night
- a DRK is good for bosses that focus on magic attacks/tankbusters (guess what are the stronger attacks in Savage)
- WAR/DRK can be more involving and so less boring