Getting a drivers licence in Germany costs roughly 2000€ (2673$), assuming you pass theoretical and practical exams on first try. You need to take 14 theoretical lessons at 90 minutes, 2 of them on technical stuff, you need at least 12 practical lessons, 5 outside of a town, 4 on the autobahn, 3 at night and you will need a couple regular lessons just to get started so most people end up with 20 practical lessons or so.

After all that you will have neither training nor experience with emergency situations, in fact you will barely be able to brake a car so that it stops as fast as possible, which the majority of drivers are simply incapable of.

As nice as it would be to have that training, your assumption that you have to add it is fundamentally flawed in that already nobody can manage his car in such a situation with or without assistance. Apart from that most Americans probably consider what Germans have to do to get a driver's license insane, I doubt they would even seriously consider implementing something similar.