I don't think sex is a good criteria for which to judge competency to vote or not. I also don't think we can really have such a judgement take place through the legal system as naturally it will be abused. So the only real solution is to allow for everyone to vote who is a citizen.

That said I do think it's important to look at the topic of women's suffrage in history and analyze some questions we'd rather not say for fear of knee jerk reaction through the lense of both our modern understanding and the lens of those in history. There are some fairly compelling arguments against women's suffrage not the least of which is that it along with most other movements towards widening the voter pool are part of a power game and those who advocated for it didn't entirely do so out of merely a desire to further women's rights, but rather as a desire to obtain power through women's votes. It's also worth pointing out that women at the time were split on this issue just as women today are split on most so called feminist issues.

I'd argue however that in general we should not as a society be encouraging people to vote in mass via public campaigns and the like. I for instance will never tell women they need to vote because frankly, while I think it's good if you want to get involved in civics and exercise your voting power, it's also a very important responsibility that isn't to he taken lightly as we do with the "I voted" stickers and rallies that treat it like entertainment, a modern arena if you will" rather than the very somber and serious business of deciding the course of society. As such I will say many women I've met should not vote, just as many men should not vote, but in my own experience the stupid men who shouldn't vote by and large don't care enough to go and do it and would prefer instead to go to the bar or play sports or games or whatever. But the stupid women tend to be much more politically active and engaged in voting and frankly I think a lot of that is the reason why social issues dominate the public discourse of politics rather than economic issues, merely because as a whole women tend to be more extreme and prone to fringes as a consequence of generally being more social than men.

Naturally this is a broad generalization and shouldn't be taken as any comment on your own individual situation. But I've met a number of women who have based their vote on such banal issues like simply liking the way someone's name sounds or thinking someone's attitude is bad on television or some equally idiotic reason irrelevant to any sort of policy. I think there's also a strong tendency for women to become activists towards single issues like abortion, or LGBTQ+, or animal rights, or what have you. And that gives corrupt individuals an in to power and an ability to ravage the treasury if they can campaign on something like ending cruelty in slaughter houses and rally a bunch of idiots to their cause who will scream down at anyone who questions the person's motives or calls for looking at the bigger picture and interplay between many complex systems and ideas with simple moral criticisms.

None of this is purely a women's issue as there are certainly plenty of women who understand well just as there are plenty of men who do not. But I think in terms of generalizations it's safe to say that activism tends to be a very feminine sphere and I think it's fair to criticize this. I won't do anything to stop women or anyone else from voting and I don't think we should, but I do kinda feel like telling women that they shouldn't vote because they are women is helpful overall. If a woman hears that and believes it she is too stupid to vote anyway and nothing of value is lost. She'll believe anything at that point. If she doesn't care and votes anyway that shows at the very least she isn't a total idiot.