The reality is that very few people want to live in that world and even if we do fully adopt technologies like this, it doesn't necessarily make us any safer. A car traveling 30 mph is absolutely as lethal as a car traveling 10 mph faster than that. And I'm much more likely to be killed by a random traffic accident (only time I've been hit on my bike was by a white women driving a Ford) or domestic terrorist/psychopath than an immigrant.
So you're pitching huge lifestyle and diplomatic costs without any obvious benefit... Please count me as a no.