how far do we take this? would we have motor vehicles if we knew how many people would be killed by/with them every year?
Airplanes are probably the example you want - heavily regulated and very focused on safety. Not motor vehicles. After all, if they really were focused on safety, they’d have banned giant trucks and SUVs for personal use a long, long time ago.
Had we known what the challenges would be, would we have made them so easy to own and operate? You need a license to fly a plane solo, and it takes years to get one.