I tend to think of voting as a responsibility rather than a right, but I can't help but think about my rights when it's brought to my attention that within a lifespan, within living memory, women did not have the same rights as men. I'm not usually a rabid vocal feminist, but that's because I believe that now, most of the time, women are equal. I am perfectly willing to stipulate that there are some jobs that men are better suited to than women for physiological reasons – and vice versa. But that's on average, based on populations. No individual should be arbitrarily restricted based on those statistics. Saying that a specific woman isn't able to do X because men are statistically better at it makes about as much sense as saying I have to change my sports team because most of the residents of this town are Yankees fans. It's not a rational statement, and it's going to meet with lots of emotional opposition as well.
I really don't comprehend discrimination based on irrelevant factors. Judge people on their capability to do a job, sure. Judge them on whether they're assholes, hell yeah. But people pick such incomprehensible reasons to look down on one another.