Apropos of nothing, I feel like it's relevant to mention that the Holy Trilogy has a grand total of three named female characters in it. THREE.
/Shrug. It's a war story, first and foremost. Star... Wars. Wars have always, and will for the foreseeable future, be fought almost entirely by men, just based on the simple facts of biology and cultural norms that have persisted for thousands of years.
I see no reason to disinclude female pilots from the game. Certainly the realm of piloting diminishes the physical differences to a significant degree. My next door neighbor is a female former Marine aviator. But it's silly to pretend that they still won't always end up as the minority among a fighting force, and not simply because most of the writers are straight white dudes.
I always find these discussions fairly humorous, though usually I have the better sense not to participate in them. Literally, the card images are tiny space ships, and more than half the names are indiscernible as male or female. Unless you read thirty-year-old comic books or played a card game 15 years ago, what the heck is a Gemmer Sojan or a Captain Jonus? Or a Backstabber for that matter. Would anybody have any reason to know that Ten Numb was a pancake-faced space-mouse unless they had read comic books? The game is played with a tiny toy space ship, and a pilot card that is a picture of that space ship. That gender even gets brought up in discussions of this game is fairly silly. It isn't like a game such as 40K, where the individual models clearly depict the gender of the person it is representing. It's literally a tiny space ship, and the pilot exists solely in your imagination.
If you find yourself sitting there finding any reason to ponder the gender or race of the cards you're playing, it's a good sign you're massively overthinking this game, and probably much of life in general. If having girl pilots helps encourage your wife or girlfriend to play with you, when she asks who the pilots are, do the smart thing: Tell them that it's whoever they want them to be.