I feel riding on a road is inherently dangerous and can't be made safe. I just can't control or predict what a motorist might or might not do at any given moment. I might think differently if I had better chance of survival in an accident with a motor vehicle.
I ride an old inexpensive bike that has steel rims and caliper brakes. This is dangerous to some, especially when it rains. But I can control my bike, adjust accordingly and minimize the danger. I can't do that with the driver of a motor vehicle.
Most people don't want to drive their cars without seat-belts or air-bags. Why would they welcome traveling exposed on a highway? Bless all of you who ride the roads. Be safe. I'll continue to wimp-out and stay on my trails and work towards a better bike trail system in the future.