It doesn't matter how you spin it - it doesn't change the fact that you're voting for, or against, someone strictly because of their gender. I mean, it is possible to vote for female candidates strictly based on their qualifications - their platform, past record, personality, etc. - and still make leaps and bounds with gender equality. Case in point: your state's House of Felegates elections in 2017.
The percentage of the electorate that wouldn't vote for a woman is negligible. Overall, men are more likely to go into politics and run for office. Women are under represented because of the aggregate of individual decisions, not sexism. No doubt, with younger generations, the percentage of politicians who are female is higher. As older incumbents (who are mostly male) retire, more women will take their places. Wave elections also help in sweeping out incumbents. While republicans have less women than democrats, they still sent women to the senate to fill seats left open by the retirement of longtime democrat senators Harkin (IA) and Rockefeller (WV). I think the male majority in politics is likely to remain, but become much less pronounced. I couldn't care less about the gender of a politician so long as they vote the right way.
Side note: Atheists/agnostics are perhaps the most under-represented group in Congress. I still don't believe I could win in a republican primary because of my lack of religion. While this is a tad annoying, I'm certainly not going to vote for someone just because they don't believe.