This is : Injuries and deaths due to firearms in the home - PubMed
OBJECTIVE: Determine the relative frequency with which guns in the home are used to injure or kill in self-defense, compared with the number of times these weapons are involved in an unintentional injury, suicide attempt, or criminal assault or homicide.
METHODS: We reviewed the police, medical examiner, emergency medical service, emergency department, and hospital records of all fatal and nonfatal shootings in three U.S. cities: Memphis, Tennessee; Seattle, Washington; and Galveston, Texas.
RESULTS: During the study interval (12 months in Memphis, 18 months in Seattle, and Galveston) 626 shootings occurred in or around a residence. This total included 54 unintentional shootings, 118 attempted or completed suicides, and 438 assaults/homicides. Thirteen shootings were legally justifiable or an act of self-defense, including three that involved law enforcement officers acting in the line of duty. For every time a gun in the home was used in a self-defense or legally justifiable shooting, there were four unintentional shootings, seven criminal assaults or homicides, and 11 attempted or completed suicides.
CONCLUSIONS: Guns kept in homes are more likely to be involved in a fatal or nonfatal accidental shooting, criminal assault, or suicide attempt than to be used to injure or kill in self-defense.
A rational person who had no bias towards or against private gun ownership would probably conclude based on this rather compelling evidence that purchasing a firearm for self defense has a higher chance of resulting in your death for various reasons than it does of saving your life.
As far as I know, all published, credible research supports this conclusion. The only research I know of that shows otherwise is a telephone survey asking about self defense incidents that had very poor methodology.
But that’s not the topic of this thread. The main thing is that if you have an electronic mechanism with a chance of failure, but the mechanism also prevents accidental shootings by anyone other than the gun owner, it may result in a net increase in lives saved even if there is a small chance it fails at a critical moment and allows an attacker to kill you.