Well, nobody denies that accidents happen. But it's extremely rare compared to the millions and millions of gun owners out there. People slip in showers and die, people drown in swimming pools, pit bulls maul children, people drink and drive... You get the point.
Yet, when you look at the majority of the violence out there with guns, the bulk of the problem isn't about some child getting ahold of a gun and shooting a family member. The real problem comes down to bad neighborhoods with gangs and drug dealing. Not the average regular legal gun owners.