We don't need to look at what happened in Uvlade to understand that good guys with guns rarely stop bad guys with guns, the research has already been done and since this board is supposedly made up of smart people who believe in scientific research, I thought I'd look for some on this subject.
https://www.scientificamerican.com/article/more-guns-do-not-stop-more-crimes-evidence-shows/
So what does the research say? By far the most famous series of studies on this issue was conducted in the late 1980s and 1990s by Arthur Kellermann, now dean of the F. Edward Hébert School of Medicine at the Uniformed Services University of the Health Sciences, and his colleagues. In one, published in 1993 in the New England Journal of Medicine and funded by the CDC, he and his colleagues identified 444 people who had been killed between 1987 and 1992 at home in three U.S. regions—Shelby County, Tennessee, King County, Washington State, and Cuyahoga County, Ohio—and then collected details about them and their deaths from local police, medical examiners and people who had been close to the victims. They found that a gun in the home was associated with a nearly threefold increase in the odds that someone would be killed at home by a family member or intimate acquaintance.
The link is very long, so I'm not going to quote much of it, but if you really want an honest answer to the question, please read it. It was done at least partly in Kennesaw, Ga, the city where gun ownership was made mandatory, although of course, that was impossible to enforce. The person who organized the study grew up with guns and wanted to know the truth regarding whether a good guy with a gun stops a bad guy with a gun. The truth is that while this sometimes does happen, it's rare. It's more common that the person with the gun will be shot or his gun will be used to hurt someone innocent, including a member of his own family. For example, about a week or two ago, a man in ATL was sleeping with his gun under his pillow. It went off accidentally and killed his two year old son. That of course is an extremely bad case, as the gun owner obviously didn't use any common sense when it came to his gun, but just how many gun owners do you think have been trained to use guns safely? There are a lot of stupid or ignorant people who own guns.
I'm married to a gun toting liberal, who does understand gun safety, although about 5 or so years ago, he finally realized that carrying concealed wasn't such a good idea. He's been selling off his gun collection and still has a way to go. He, like many men, collected guns like many women collect jewelry. He was under the mistaken idea that guns were a good investment. Not so much. I was taught to use a gun, but never felt comfortable with one, so I've never carried or kept one in my possession. I've read too many stories about accidental gun deaths or about guns being snatched from the owner's hands and used against them. I hate guns. I hate the 2nd amendment, which imo, is one of the dumbest things the founders ever wrote into our constitution. Sadly, too many Americans value it more than the better parts.
I've also known many, mostly conservative women who think I'm nuts for not carrying a gun. One of them is in her 70s, has many health problems and can barely walk after surviving a bad case of COVID. I can just imagine what would happen if someone broke into her home and she tried to use a gun on them. IF the police in Uvalde were too scared or disorganized to try stop a man who was using a gun on children, how in the world would the average citizen competently use a gun on the bad guy. Sure, it happens sometimes, but the reverse is more often the case. Just do your DD and read the link from Scientific American for more details and evidence.
Btw, for those who don't know this, our idiot Republican governor recently did away with requirements for concealed carry permits. So, now anyone in Georgia can carry concealed without so much as a background check. I don't understand the gun fetish. It's insane, imo.
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But you're a lot less likely to get killed if he doesn't. Wounds heal, death not so much. 
