> Crappy for cars means crappy for buses which are public transit.

Not if you give sufficient priority to buses.

Cleveland has an excellent center-running BRT line: https://nacto.org/case-study/euclid-avenue-brt-cleveland-oh/

And NYC is starting to implement busways: https://www1.nyc.gov/html/brt/html/routes/14th-street.shtml

This is not an obvious thing. Cities can (imo should) give more priority to buses in the form of dedicated lanes and traffic signal priority.

Sure, but the commonality is both need roads and at some point they'll be an interaction between cars and buses.

If the situation is crappy for cars, it will impact the buses at some point.