Can't we ask the same about cars, boats, knives and planes? For that matter, anything man made that can harm someone in any way?
How long until every motor vehicle has a breathalyzer built in? Because we shouldn't just do that for those who've shown to be problem children, the nanny state needs proof they did everything in their power to protect law abiding citizens from each other, right?
When the technology is ripe, it will become one. Right now the technology is unreliable enough to create a manufacturer liability situation that is unacceptable, and a failure result that is unacceptable to their customers.
Correct. I spent a pretty penny on a small biometric safe that was reviewed by not only "the security industry" (who has a desire to sell safes) but also the experts who attend DefCon and make it part of their living to defeat such devices so they know how to properly defend them.
(It's not a "gun" product, it's a security safe... There's a whole rant I could go into over the quality of "gun safes", but that's a different topic. Let's just say most of the cheap ones are easily defeated via a paperclip.)
This thing was the "fastest" and "most accurate" biometric fingerprint device in its size class a few years ago. It takes three to four seconds to read a finger, and that ain't gonna cut it in a self-defense scenario with a weapon.
It also has about a one in ten fail to read rate from my experience with it. There's a newer model that upped the read speed to 2.5 seconds plus whatever time is needed to actuate the unlock mechanism and also the time to press the start button. It is not automatic and "always on.
I suspect the current draw of such a device with this level of accuracy and speed is too high to leave it active all the time. Applied to a firearm, it would need a "read me now" button or grip safety type of device to activate it.
So biometrics isn't there yet. Not even close. Not at any reasonable price tag, and this thing I have wasn't exactly low cost.
It fails close to 100% of the time if there's any moisture on my fingers.
The rings and other RFID devices are mostly totally hacked at this point. All of the first and second generation low bit-count versions used for automotive key fobs are useless $100 hunks of garbage that make your car key fat. Third generation are better but still defeatable and the car thieves are always one step away, sometimes ahead, sometimes behind, of the "state of the art" in those devices.
The ones touted for firearms use are the identical chipsets and only a few manufacturers make them in mass quantity. Microchip and Atmel are the bulk variety.
Specialized ones are available, but they aren't even close to cost effective.
None of the options is worthy of consideration at this point on a firearm. Most of the prototypes are tiny companies hoping to ride the populist wave to some venture capital.
No big VC money flowing into the market. They'll give them a little money and see if they actually have engineers making something truly different. So far, nada.