Samurai X, Rurouni Kenshin, Samurai Champloo, 7 Samurai, etc... We all know the trope. They kill their enemies in a single blow 10 v 1 and everyone standing nearby is shocked and amazed at their l33t skillz0rs. It's tantamount to DPS - killing so quickly and so precisely the enemy can't fight back.
Whether it looks funny in game mechanics or not is irrelevant. I believe the fantasy they're going for would be a swift striking DPS that probably deals lots of burst damage so against lesser creatures and foes out in world/trash packs they'll tear right through them with ease. Monks, NIN, Dragoons all "fight from the front" out in the world.
Traditionally Pikemen would line up like this:

So do Dragoons seem silly because they're not lined up in front of the monsters tanking stabbing them in the face?