Even in the 60's we were smart enough to know those are show bikes. A front brake can save your life. There are more distracted drivers than ever. They are eating, drinking, putting on make-up, shaving, turned around looking in the baby seat, and even reading.
Not to mention pedestrians, deer, dogs, coons, cows, tree limbs, power lines and even an occasional pig. Put on the best brakes you can and practice stopping in a safe area. The life you save will be your own.
And yes, I have witnessed all the above.
Jeez.