the end result is the same. You've made a cost benefit analysis that it's worth 40,000 deaths each year to own a car. Most people make that choice. Society could restructure itself to not commute as far for work, live closer to stores, etc... but that's an inconvenience.. and any way you slice it, we've decided that 40k deaths in auto accidents each year is worth it. You yourself have made that decision, and you are perfectly fine with that. It could probably double, triple, or even be increased 10 fold and you would still be fine with it. You care more about your right to commute and own a car than the 40k people that die each year.
We do this everyday for all things.