>>719933468
It was a "We can barely find enough men that are genetically adapted to the cybernetics and shit, so fuck it let's just use any women we can find that might work too" thing. Spartan Is, which is what Johnson is, tried to use the cybernetics on anyone, and it had a 99% mortality rate and people went fucking insane from it.
I mean over half of the spartan II children died during the augmentations, but it was still better and produced way more effective troops.