Not necessarily! Firstly, I was offered a share in a helicopter; for various reasons, nothing to do with the gender diversity of the group but more the way the group was managed, I declined.
Could it be that women don't tend to buy shares in aircraft because, on the whole, their earnings are less than mens'?
I've had no difficulty finding flying buddies although I prefer to fly on my own (or with friends as passengers). They are all individuals who happen to be men. And we get on fine.
Cheers
Whirls