Besides, if you do get in a pinch, you can roll your bike with you while you walk in many cases. In the cases where you cannot, you can usually leave it locked somewhere and fetch it later on. You can do this in ways that you cannot in a car.
Besides, a bicycle only takes a portion of the materials to make a car - even two of them only take a portion. It is still friendlier.
Bike insurance can cover the rest of the bike.
Owning a car in Amsterdam is crazy expensive due to parking. For example, the parking costs at my office is about 500 EUR/month (only to park during workdays between 7AM-7PM)
Trondheim (Norway), on the other hand, has a hill with a bike lift. Just one, though. The rest you have to pedal. I, the immigrant, still find it amazing folks ride bikes with studded tires on the snow, let alone manage the terrain. I usually just walk.