I just don’t understand the ‘it’s dangerous, you need to be able to hear traffic coming up behind you’ thing. How do you tell the difference between the sound of a car that’s going to approach and pass you safely, vs the one which is gonna mow you down? Do you get off the road whenever a car approaches, just in case?
I find the wind noise without headphones makes it harder to hear cars anyway, eliminating that and listening to music means I can hear cars better. Anyone who doesn’t check over their shoulder before turning is a moron anyway, irrespective of whether they’ve got the hearing of an owl or are stone deaf!