@Naoki Yoshida-> Make Samurai a Tank class!

[Thunda_Cat_SMASH]

Man, we don't need another 2 handed sword tank? I know what will fix it! An offensive magic and 1 handed sword using tank!!!1 That's so much better!

Your lack of self awareness is staggering.

Fixed for ya.

Skills PLD can use that has casts:
Clemency, Cure, Raise, Protect, and Stone Skin.

Additionally, why would they make the tank have damage dealing casts when interruption is infact a thing?

The fact of the matter is that none of the above are used regularly or commonly. The one that's most frequently used is Clemency for a quick spot heal and stoneskin when there's literally nothing else. You could make a case for protect being rarely used to rebuff someone that just died, but none of the above are frequently used during normal play. SS is rarely ever used once they get access to Divine Veil, and no competent pld uses Cure or Raise(except in PotD)), which only leaves Flash. DRK has more spells.