I don't understand why cities even allow cars. For example Amsterdam would work so much better if the roads became bike/electric-scooter* lanes with limited car

I don't understand why cities even allow cars. For example Amsterdam would work so much better if the roads became bike/electric-scooter* lanes with limited car access. In New York (well, Manhattan), London and Paris it would work even better because you have a subway. That would also solve the air quality problems of those cities in one fell swoop. * Gas scooters - particularly two-stroke - are a relic from the past and need to be banned.