They’ve tried that. Take a coin, call a side, and flip it. Did you get it right? Gun shoots. Did you get it wrong? The other guy shoots and you die. That’s how accurate the biometric safety is.
Also, on a device that is under extreme vibration and shock loads when used, this equipment will have issues and fail at the worst time. Guns are effective because they are drop dead simple in design.
Oh, good, this needed to happen. People making grandiose claims about AI’s capabilities that it’s nowhere near ready for needed to be shot down.