Redesigning cities to be less reliant on cars is pretty much a solved problem. It just needs a few decades of focused policies. Check out for example how the Netherlands became bike friendly by relentless improvement since the seventies.

And being completely flat and never getting very hot/cold. Bikes aren't really workable in most cities as a primary form of transit.

Ebikes make most cities flat, and the Netherlands only relies on bikes for last mile transport. Medium and long-haul routes in the Netherlands have great transit options.