That makes no sense because people won't buy cars without seatbelts or airbags - and if they do, it's them dying, which they should have the freedom to do.
Regarding your second point, that's also objectively incorrect. When accidents happen, passengers, especially backseat passengers, become projectiles that cause additional injuries or excess deaths for other occupants. It's not just the dude not wearing a seatbelt dying, it's also the people around them.
Either that or we come up with laws that keep us competitive without destroying everything around us. I hope that's what Europe will do and I will support regulation that takes a tiny bit of comfort away if it makes us more resilient in the face of climate change and geopolitical difficulties.