Let's remove guns from the equation. Think of something else that might save your life, say, an epi-pen when you're deathly allergic to something. Now, you obv

Let's remove guns from the equation. Think of something else that might save your life, say, an epi-pen when you're deathly allergic to something. Now, you obviously don't want your kids fooling around with it, possibly accidentally injecting themselves and coming to harm. Some company builds a complicated piece of technology using "biometric scans" that requires a fully-charged battery in order to work at all. Are you going to buy one of these when you're basically going to die if you can't get to the epi-pen in a hurry, just gambling that you'll never forget to charge the battery, and never need it when your fingers and/or the sensor have schmutz on them? No. You aren't.