Please understand that male moonkeepers are more than "they just get born less"
They are highly territorial. They leave their clan when they come of age. They live alone in the forest for most of their lives, only coming in contact with clans to mate. And they are extremely antisocial.
This was all reasoning as to why they weren't available in 1.0, and the lore characterization has not changed since.
We're not really glossing over anything when we say "they ripped moonkeeper lore and tacked on a long lifespan."