Not sure if this is what you're saying, but the truth that nobody wants to hear is that cars are inherently dangerous because of their speed. The best way to save lives if have roads that encourage calm careful driving (bollards, single lanes, speed bumps, trees, ...). People want to have their cake and eat it. go as fast as possible, yet still be "safe". That's fighting against the laws of nature, weight + speed kills, it's just impossible to square that circle. We just need to internalize that in our hearts, and externalize this in our infrastructure.
Cars are dangerous because of speed, weight, dimensions and all sorts of specific things about a specific car.
But the speed is good. Speed means people get to do more of what they like and live in places that are better for their health.
Weight and large dimensions however, are horrendously bad for safety and efficiency and additionally, useless. The overwhelming majority of cars outside of professional use don't need to be bigger than a Lancia Delta. Nobody who isn't a farmer with a specific license needs a pickup truck. And even then, people who need to move stuff around drive vans, not pickups. Literally nobody should drive an SUV in any context.
