You're making your (our) cause look bad. There are a lot of issues with cars but this isn't one of them. Cars essentially work as intended, and when they don't there are recalls, lawsuits, and NHTSA investigations.
There are all kinds of externalities, including safety, which are ignored. US tax policy which allows write offs only for large vehicles which are more likely to cause deaths. Tire emissions. Congestion pricing -- common in Europe -- needs years or reviews and lawsuits. NHTSA doesn't require bicycle test devices.