Pressing the brakes in a car saves the operator's life. Firing a gun does not save the operator's life. It damages or kills something else. There's no correlation.
Obviously you've never had your life threatened by someone who means to see you dead. Firearms are used defensively millions of times a year. No doubt you'll try to dispute that, but I'm simply getting info from the CDC:
“Studies that directly assessed the effect of actual defensive uses of guns (i.e., incidents in which a gun was ‘used’ by the crime victim in the sense of attacking or threatening an offender) have found consistently lower injury rates among gun-using crime victims compared with victims who used other self-protective strategies,” the CDC study, entitled “Priorities For Research to Reduce the Threat of Firearm-Related Violence,”
The Institute of Medicine and the National Research Council released the results of their research through the CDC last month. Researchers compiled data from previous studies in order to guide future research on gun violence, noting that “almost all national survey estimates indicate that defensive gun uses by victims are at least as common as offensive uses by criminals, with estimates of annual uses ranging from about 500,000 to more than 3 million per year.”
When someone breaks into your home at 3am and comes after you with a knife/gun/hammer, and your gun doesn't work, I assure you the analogy is spot-on. If the biometric/RFID/whatever works properly, an innocent life is saved. If it doesn't, an innocent life (or lives if you have a wife and kids) is/are lost. It's really quite simple. You're just choosing to pretend to not get it because you don't like the point being made. That's asinine.
Most people who shoot other people are not in any danger.[citation needed]
I don't know who "most" people are, but I can tell you that of the few people I've met who've had to use a gun defensively (most of the police officers), they were most certainly in danger before they ever reached for their gun.