Why are the high summoner's armlets rigid?

[Risvertasashi]

The floppy sleeves are a new piece of equipment, and dangle in a way that no previous piece of equipment has. New movement patterns would need to be designed for each and every action you can take in the game. Running, fighting, weaponskilling, even just standing still in the wind. Or, they can just leave them stiff as cardboard. Can you guess which is the easier solution?

For that price I would have hoped they would have been willing to put a tiny bit more effort in. Silly me, yeah... too bad we can't get a refund :/