[DaikaijuSokogeki01]

Quote:

Originally Posted by Matrixbeast

It's just to keep costs down. They can only make so many new suits, and if a good chunk would be for incidental background characters, then it's just a waste of money.
A lot easier to have the few Kikainoid helmets to establish them as background characters.

Not only that, but it's a simple enough helmet that can be put on by just about anyone. Keeps the number of maskless extras on screen down to a minimum.