Tanks keep leaving the dungeon

[Lithera]

Except they can do other things in that 30 minutes.

Of course they can but they still need to hit that roulette if they want their bonus. It's a pretty hilarious roll of the dice to ditch Lost City when you could very well get it again when your penalty expires. Going to ditch again? Now you've burned a full hour that you can't run a dungeon and pissed off six people instead of just three. Not to mention you still haven't completed your roulette.