You're not wrong that the law should change, but there is one thing here. Generally, when we say that 3-wheelers are unstable, we're talking about one in front/two in back. The opposite configuration, which is what Aptera is using, is generally pretty stable. That one picture of a guy on a recumbent trike is unusual. You almost have to try to do that on purpose.
They won't, because then it's legally considered a proper car that has to have air bags and crumple zones and such. They can only make it small and cheap because it's three wheels.
Raising the standards would result in 20-50% of the worst drivers being forced to do something else. If our infrastructure wasn't so car-centric, that would be perfectly fine.
I believe that goes through the Road of Bones in Siberia. From what I saw of Long Way Round (where Ewan McGregor and Charley Boorman ride around the world on motorcycles), it's not really a road much of the year. You wouldn't want to walk it in the winter for obvious reasons. You also wouldn't want to walk it in the warmer seasons, because the snow melts and floods the road.
It's only a road in the sense that Google Maps marks it as one.
The documentary simply couldn't continue on the planned route, and they hucked it over to Alaska early on. That was after putting up with some shit ass mud in and around Mongolia where they were dropping their bikes every 10 feet (and I am not exaggerating).
It has to function the same. It has to follow the same laws as before.
Bur more likely, they know this and it's all part of privatizing social security.