[dionidium]

I think it's pretty easy to think of reasons:

1. They drive to work and erroneously assume their customers also arrive by car

2. They're more likely to be old and dedicated to a car-centric society

3. They're more likely to live in outer boroughs and don't care much about neighborhood walkability

4. They heavily protested the changes and are invested in the idea that it wouldn't work

5. The minority of their customers who do drive are very loud. They hear them complain whenever they come in and so erroneously assume they're representative.

6. Self-reports are generally unreliable and inferior to actual measurement

I think I could probably think of more, if I had to.