The argument for drive-by-wire in personal automobiles is basically that it's safe enough for airplanes, so it should be safe enough for cars.
I mostly buy that. But there's a glaring omission in the reasoning.
In airplanes, there's a full incident investigation for EVERYTHING that goes wrong. Even near misses. It's an industry that (mostly lol boeing) has a history of prioritizing safety. Even at its worst, the safety standards the airline industry and air transportation engineering are orders magnitude more strict than those of the automotive industry and road engineering.
In real terms, automobile incidents should be taken just as seriously. Even near misses should have reporting and analysis. Crashes should absolutely have full investigations. Nearly all automobile deaths are completely avoidable through better engineering of the road systems and cars, but there is mostly no serious culture of safety among automobiles. We chose carnage and have been so immured by it that we don't even think it's weird. We don't think it's weird that essentially everyone, at least in the US, knows someone who died or was seriously injured in a car accident.
So yeah, we should have drive-by-wire. But it should also include other aspects of that safety culture as part of the deal. "Black box" equivalents, for example, and the accompanying post-accident review process that comes with it. A process that focuses not on establishing liability, but preventing future incidents, because establishing liability is mostly a thought-killer when it comes to safety.
...of course, if we actually took road safety that seriously it'd be devastation to the entire car industrial complex. Because much of that industry is focused on design patterns that, in fact, cannot be done safely or sustainably.