You might feel men are being dismissive if they don’t jump at the chance to do a tech-demo for you, yet the fact is that we’ve oft been conditioned by the women in our lives to avoid geeking out at them about our latest project. If, otoh, you ask a question indicating your interest, and find yourself brushed off, that’s another story. Maybe just ask, “Is this running on Arduino?” and they’ll more than likely gush forth with all manner of detail.
Still, not sure I see the “problem” with few women in tech. Opportunity, yes! Funneling women into tech? Why?