Why not? O Sensei fought true swordsmen and won. Why shouldn't the rest of us aspire to at least not look stupid with swords in our hands?
O'Sensei used Aikido principles and developed his own way with the sword and being as good as he was from there could demonstrate it's superiority.
When you are good enough at Aikido sword or Aikiken then may you be able to do the same.
Kokyu techniques look stupid and always will to those of other budo, budo of different definition, but when you are good enough what does that matter.
You look stupid only to the stupid.