Trouble is, no matter how much evidence you give many motons, they remain stubbornly stuck in their views. In fact, I've discovered that the more evidence you give them that their view is wrong, the more they seem to dig their heels in an insist that they are right, on the grounds of their opinion alone ...
I've commuted by car, bicycle, tube and train. All have their benefits and all have their costs.
I'm not sure very many motorists do remain
'stubbornly stuck in their views'. They may have their own reasons for driving to work.
Their view may be wrong according to your priorities, but not be according to theirs. In matters of opinion and conflicting priorites, there are many as many preferences as there are options.
If I disagreed with someone who made a case and they just kept piling on the evidence, I might very well give the impression of digging my heels in.
It is likely that a motorist knows their journey would be faster, greener, cheaper and less congesting by bicycle. Those may not be the deciding issues for that motorist. We may disagree with that, but it isn't necessarily wrong.
Even on the seemingly fixed matter of elapsed time, a motorist may value time behind the wheel listening to Radio 4 more highly than time spent on a saddle. I wouldn't, but some might.
It may be that thr reason the motorist digs their heels in '
on the grounds of their opinion alone' is that in this matter and as it affect them, their opinion is key.