I don’t think it’s a case of a lethal safety device per se - rollover/crash switches are still present in modern EFI cars and they work fine - but more “cheap implementation of safety device that has aged poorly.” The Ford ones are notorious for getting twitchy when they get old, to the point that some people have demonstrated that slamming the door, kicking the floorboard or slapping a fender can trip the cutoff switch in old Fords.
I’ve never heard of the Jaguar switch tripping without the car actually rolling or being in an actual severe accident even though it’s almost 40 years old. Still, I put in a bypass switch because I had a bad week in the LA Riots in 1992 and I drew the correct conclusions from Reginald Denny incident. My Toyota has a G-force sensor that will have the computer cut the fuel, but it’s pretty insensitive (it’s an offroader) and you reset it by simply attempting to restart the vehicle.
I’ve had two Ford trucks. One where the crash switch failed on a smooth road and in heavy traffic. The second truck I bypassed the switch the day I bought it.