I've known plenty of women and girls that could put guy's models to shame.
Those who've been reading FSM for a while are not only familiar with the models of Michelle Choquette (Her 1/32 two seat AV-8 Harrier conversion from the old Revell kit was amazing) but the name Susan Atai might ring a bell with some of you too. She's had a few of her projects featured in reader galleries, a couple of years ago she had a vinyl Alien in there and it was simply a mind blower, the paint job was amazing.
I'm pleased to share the hobby with female builders, I've seen plenty of kit packages with notations that the kit should not be for modelers under a certain age, but I've yet to see one that said "Guys only"