Keep in mind guys, that all the thing I write function to advance plot, and the writing opportunities in Divinus. So, in the broader scheme of things, Cosmic Knights aren't weapons, but characters that can be written. I should mention that they have their own will, which transcends Sin Auto-Win, and Lifprasil's emotional control; otherwise they wouldn't be so powerful. So they aren't firmly tied to a military life, they may be exceedingly powerful, but as Astarte willed it, they also enjoy gardening. So if anyone wants to, they can play a Cosmic Knight freely.

In a sense, they're meant to be the first mortals that are even above the sway of the gods.