I remember watching 60 minutes, and watching streets in China filled with people riding bikes everywhere. Fast forward to now, and clearly even communists prefer cars. The reasons are endless why a car is superior way to travel, 99% of the time for most people.
However, I have nothing against bikes. I rode one my first year of university, daily; rain and snow. I was a poor student. It had its benefits, but it sucked in many ways.
Separated Bike paths is both a safer and nicer experience. No need to try and get rid of cars.
Because biking in cities is dangerous, I wouldn't go around telling people to do it.