I get where you're coming from, but the "good guys with guns" folks don't give a shit whether their argument is neutralized or not. Internet debates never changed anything. Arguing for the sake of debate can be loads of fun, and I'm all for it generally, but this is an issue that requires action and we fail to do anything over and over.
If we could somehow manage to magically fix mental health issues, clean up the police departments and ensure they respond properly to dangerous situations, elect finger wagging soft hearted folks who speak eloquently on the evils of gun violence, raise the age to purchase a gun to 25, pass red flag laws in all 50 states, etc. etc. etc., school shootings and mass shootings will still happen. There is only one way to stop it. But we won't do it. We will, however, bitch and moan about all of the ancillary issues because subconsciously we think maybe something will happen to address those. I suppose from a palliative standpoint that makes some folks feel better. I thinks it's fucking pointless.
It's going to take the type of passionate, pigheaded, long-term, potentially insane behavior that has led us to the point of Roe v. Wade being overturned to change gun laws in this country. That's what we need. Steal their playbook. Get it done.