My father is a cop. The laptops they give them come with fingerprint readers. Most of the time, he simply cannot get into his laptop. The technology isn’t there to let a cop access his computer under a no-stress situation, the technology isn’t there for when you’re grabbing your pistol in the middle of the night in a flop sweat with the wrong hand trying to fend off an attacker.
Guns are supposed to be simple tools. You pull trigger, it goes bang. Every doodad you hang off of the damned things to prevent that is one more failure just waiting to happen.