> That's less than an hour for any cyclist and a fit cyclist could do it in half that time.

And how long for a car? 5min? 15min?

If you have a car, then you will likely use it for some percentage of trips. That's a pretty serious motivation to not become "a fit cyclist".

All of these problems work together. This also works in the inverse: a good solution would do something to resolve all of these problems.