Yes and no.
One of my colleagues was on the board that wrote the accepted Use-of-Force POST guide, for use by private prisons in Arizona. The "approved methods and tactics" taught to cadets (in every form of LE) are arrived upon by a simple method: what gives us the best bang for the buck. This is done on an agency by agency basis. POST has a huge encyclopedic host of tactics that may be used, however, paying people to train to become proficient in all of them is cost prohibitive. A physically fit state trooper in a small, wealthy state will get much more comprehensive training across the approved Use-of-Force spectrum than will the part-time cop in Sheavesville County, population 3,500.
Time and time again, when training LE, we hear them say "We aren't approved for non-POST techniques." Some get shown the massive missive of POST, then ponder "Why wouldn't they teach us that?" Some don't care, having an inherent trust in politically-motivated supervisors trying to save a buck by cutting corners wherever possible.
If a firearm could only be fired by its assignee (or fellow team members), 100% reliably, sure.
But the same was said of aircraft and fly-by-wire technology. There never is a 100% reliability on any system, mechanical or electronic. Which is why the new aircraft equipped with fly-by-wire control systems have mechanical backups.
I'd be willing to bet a chicken dinner that we will soon see mechanical redundancy in automobiles/trucks too, following the recent hacks of Jeeps and other vehicles.
For the most part, public firearms training isn't mandated and, even where it is mandated, retention techniques are not a part of the required curriculum. The prevailing attitude seems to be "Since it is a burdern on my time and finances, it isn't worth learning."
Even in LE, large swaths of the community have no exposure to retention or disarmament techniques, due to bureaucratic decisions. When I went through Arizona COTA such training had been discontinued as "too time consuming/too expensive". Fortunately our class commander (former Army SF guy) felt we needed it, so we learned what the formerly approved tactics were.
Rant off.