Passive safety (after you crash) can only go so far. Active safety (not crashing) can protect you far better.
You’ll never make a consumer vehicle that can protect its occupants in a 100mph head-on collision with a semi truck. But you can make a vehicle that turns that crash into a 40mph collision with minor injuries or even avoids it completely.
I rented a car recently that would steer back into the lane if you went over the line. It was great. Would definitely save my life if I fell asleep on a long roadtrip and started drifting.