Do you think it's wrong for a woman to shoot a man who is raping her? Is it wrong for her to practice gun use to prepare for that possible threat? Do you support police use of firearms to neutralize criminal use of firearms?
I imagine the person you are replying to is not a closet rape supporter, but they likely think that allowing every adult member of a population to arm themselves is not the ideal solution. I imagine you disagree with that view, but the way you have expressed yourself is the start of an emotional flame-war, not a discussion.
Guns are dangerous. Yes they can be used for self defense, but they are also dangerous on their own.
I believe that un-regulated guns are more dangerous (to everyone) than the danger of some subset of people being more vulnerable without them.
I'm not advocating for a ban, but heavy regulation about who can buy them, how, what kind of training they need, and verification of safe storage. Just like I'd expect my government to do with other highly dangerous things like explosives, some drugs, and more.
You can't anonymously own a car in the US, you can't (legally) buy one at a car convention then take it on the road without registering it. Larger knives have regulations and rules around who can buy them, and some are just illegal to own in many states. Tequila requires you to be over a certain age, and you can't buy it if you are visibly drunk.
These things are dangerous. Yes, they won't jump up and attack someone on their own, but even well educated sane good people have accidents with them, which is what I mean by these things being dangerous.
And just like with automobiles, I don't think banning them is the right move, but I do think requiring a "gun license" where you can prove that you know how to handle, store, and can show you have the skills to safely use a gun should be required, as well as registering and proving that you have a safe place to store them that is out of the reach of children, mentally ill adults, and theives.
Safe gun owners will need to do very little to get approved to continue owning guns, and many unsafe gun owners can be denied. Not to mention that increasing the "average" storage security would mean that less would be easily stolen reducing the number of unregistered guns available for purchase on a "black market".
I'm pretty sure that means we will either continue the path we are on now (which makes things "about" guns illegal, without making guns illegal or registering them), or we will leapfrog the registry and just outright ban most models or types or people from owning them.
Like you said many gun owners are letting perfect be the enemy of good here, and are unwilling to compromise on something that will allow them to keep guns for sport and self-defense in some situations. And that's going to lead to pressure building up to the point that their complains aren't going to matter, then they won't be listened to at all while the avalanche falls removing most or all gun rights.
Otherwise you get two people talking past each other. The fact that there are people who are fans of gun control AND express themselves immaturely with vapid politicised statements appealing to emotion doesn't excuse the almost trollish characteristic of the "do you think women should be defenseless against rapists" above.