Worth clarifying: I'm not saying you should ignore the issue of balance, I'm just saying you should ignore the issue of "sexism in technology".

Making efforts to hire a team with some male-female balance is just as worthwhile as making efforts to hire a team that's balanced long other criteria. No one wants to work for an all-male company, just as no one wants to work for an all-female company. There's not even really a need to look at the market opportunities side of things. Balance is just more comfortable for everyone.

If you're creating a company and planning you're hiring, and you're not a jerk, you probably are worried about keeping some kind of balance.