That's a lie
I know thousands of gun owners none of them have killed themselves. and the only person I know that killed himself was a friend from high school who made his own gun back in the '70s shot himself in the head.
I've known three people who've been killed with guns. Two suicides and one lady who was killed in a domestic argument. Those people would all be alive today if there wasn't a gun in the house. None of them was a criminal that anyone needed defending from.
In another thread, someone laid out several of the flaws in Kellermann's “study”. One that I knew of, long ago, was a bit of willfully-deceptive statistical sleight-of-hand on Kellermann's part. He counted, as “a gun in the home”, every instance of a gun brought into someone's home by a criminal intent on using that gun to commit a crime against the occupants of that home. So, by his methods, anyone murdered in his own home, with a gun, was killed by a “gun in the home”, unless the shot was fired from outside the home; even where there was no gun in the home until the criminal brought it in with him to commit that crime. And by framing his conclusion as “A gun in the home is «X» times more likely to kill a household member than [to kill] a bad guy.”,
Actually, you have no idea what was in Kellerman's study. Of the 43 times that a household member was killed, 39 of those were suicides. 0.5 were accidents. the other 3.5 were domestic violence of some sort.
It also turns out that Kellermann greatly-exaggerated what, even by his own dishonest methods, his “study” showed. Called on that, he was compelled to revise that estimate down greatly, to a number in the low single-digit range. A quick Google search shows me that the revised figure, down from 43%, was 2.7%.
He did nothing of the sort.
In fact, every study done since Kellerman has validated his findings.
https://www.scientificamerican.com/article/more-guns-do-not-stop-more-crimes-evidence-shows/
Most of this research—and there have been several dozen peer-reviewed studies—punctures the idea that guns stop violence. In a 2015 study using data from the FBI and the Centers for Disease Control and Prevention, for example, researchers at Boston Children's Hospital and Harvard University reported that firearm assaults were 6.8 times more common in the states with the most guns versus those with the least. Also in 2015 a combined analysis of 15 different studies found that people who had access to firearms at home were nearly twice as likely to be murdered as people who did not.
This evidence has been slow to accumulate because of restrictions placed by Congress on one of the country's biggest injury research funders, the CDC. Since the mid-1990s the agency has been effectively blocked from supporting gun violence research. And the NRA and many gun owners have emphasized a small handful of studies that point the other way.
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.