You would still have to develop good biking infrastructure.

Also, what if people aren’t physically able to take the roughness that can come with riding a bike/scooter (I ride my bike as my main form of transportation and bad roads can be really aggressive) In that case you would also want to throw in a good transit system people could reliably use and get to places at a reasonable time (my local transit system is so bad that it would take an hour and a half to get to school, whereas it takes about 40 minutes by bike)

And at the end of the day, supporting a multitude of different transport methods from walking to high speed rail is beneficial for everyone regardless of thale situation we end up in.