It takes a long time for societies to evolve and it is a gradual process. Implementing this in new cars now would mean a couple decades or more before it's ubiquitous. As the father of a young boy, I would be willing to make the sacrifice to know that by the time he's old enough to make stupid mistakes these protections would be in place on the road.

Allowing almost anyone to operate a multi-ton, extremely powerful machine at high speeds, that can kill people in a instant, and is indeed a leading of cause of death, is not a natural human right. The public road is already a highly regulated environment, as it should be. Traffic laws are not "running" anyone's life, that's just a reactionary sound bite. Future generations (if our civilization survives long enough) will look back at this era of automobile deaths and horrific accidents caused by human error as barbaric. In the long term, all cars will be autonomous and humans will not be allowed to drive themselves on public roads. Speed limiters, and other automated safety measures, are a logical step towards that future. The increased safety, in the long term, will allow legal speed limits to be safely increased.

Don't get me wrong, I don't live in the EU, and I do speed on the highway, but I'm not proud of it and I'm terrified of other drivers who speed (sometimes recklessly). As a start, a "generous" mandatory speed limiter (such as 50km/h OVER the legal speed limit) makes a great deal of sense. Someone doing 100km/h in a 50km/h zone, where children could be playing, is a heinous crime.