What it boils down to is this.
"How many people will not buy it if there's only male options, compared to how many will not buy it if we cut a butt tonne of the customisations?"
The answer is, less.
I'll be honest, I'd prefer is they went the other way and only made female characters and said something like "It's an amazon nation of only chicks." and you have the same archetypes of Bulky meat head, "Average" Joe who's actually more like Adonis, Thin, wiry but still muscular guy but replaced with Bulky meathead chick (Like this one chick at the gym near my old house who would do pull ups for longer than I'd do cardio on the stationary bikes.) "Average" Jill who's actually more like a muscular swimsuit model (Think muscular femals comic book characters, like some versions of Mystique) and thin wiry chick, like a real female athlete, say a tennis player or runner in real life.
PS. Am a dude, but think that there's no ploblem with female leads. I'm surprised more games don't jump on it as a "gimmick" (which is how they'd see it) and accidentally lead to a more equal opportunity workplace for leading characters.