It has been shown that by closing their windows car drivers induce a similar loss of audible data. Are you saying that we should not allow drivers to close their windows ?
...or more about your attitude to the many riders with hearing difficulties?
Q1. Of course not. I presume you drive a car, ride a bike and maybe also ride a motorbike. Do you not, like me, have a very different appreciation of the road around one depending on the mode?
In a car you have a stable platform plus three large mirrors which, in well set up vehicles, gives you 360 degree vision without moving the head. Your peripheral vision will spot unexpected events and elevate them to the concious unless you are dozing or distracted (and yes too many are). You are much less concerned about the road surface and the urgent need to change direction. Sound cues have less to offer.
On a motorbike although less stable you still have good rear vision although the consequences of missing something are much greater that you need the lifesaver glance. Sound cues are missed because of the helmet and engine sound.
Bicycles give you no rear vision (I've tried bicycle mirrors but they offer very little and at a cost that IMHO cancels it out). One relies completely on rear glances and sound. Whilst those glances will provide the most accurate information they can never be as frequent and long lasting as one would wish. The peripheral vision warning is absent. Hence sound so often gives the cue that there is something there that needs to be checked out. In stress situations where looking ahead is essential sound may be the only informing sense of the situation behind. That can influence you decision on braking, swing to the left or the right.
Q2 What precisely are you insinuating about my attitude to "riders with hearing difficulties"?
I think I had stated that openly and fully explained that in an earlier post. It is after all the reason I'm posting to this thread. What is your problem with that and how is it connected with Q1?
Puzzled ...