There’s like totally documentation where these decisions are discussed. Not just theory. But like actual design decisions and rationales from the creators. The intent was specifically to make sure the female characters didn’t upstage the male characters for the presumed teen male audience.
it’s the same reason the traditional 4/5 character superteam only has one female character on it, and she is typically positioned as the romantic interest of the leader and triangle with the rogue/lancer.