Human life is messy, and mandatory controls risk doing more harm than good. To your exact "generous" example, a decade or so ago we suspected my great grandfat

Human life is messy, and mandatory controls risk doing more harm than good. To your exact "generous" example, a decade or so ago we suspected my great grandfather might be in trouble (didn't call his son at the normal time, couldn't be reached, wasn't home when we went to check), and we eventually found him nearly dead from hypothermia after he'd slipped trying to move a tree out of the road and couldn't get back in his truck. It was in the middle of nowhere and would've taken at least ten minutes just to drive somewhere that had some kind of landline or cellular connection to call an ambulance out, and we instead drove roughly 113km/h on a 48km/h road to get him to the hospital (limit was so low because it's super windy and steep, not because it's residential). We got him to the hospital 10-30 minutes faster than the soonest he would have been in an ambulance otherwise and more than an hour faster than how long it would have taken for the ambulance to arrive and get him hospital. I don't know if the extra time made the difference, but I wouldn't want to have to fight some kind of mandatory speed limiting if I had to do that again. If it could be disabled (maybe even every time you start the vehicle) I'd be a lot more okay with the idea -- kind of like how traction control usually does what I want but once in awhile I need to disable it to get out of a hairy situation when it doesn't quite understand what's happening with a foot of snow and patches of ice on the ground.