The original poster claimed that car usage is the norm in the Netherlands, which implies that anything else is outside the norm, or unusual. This is obviously incorrectly.

There are various other posts in this thread that also give statistics, and the number of car vs bike journeys is not so far apart.

In a country that famously has more bikes then people, the idea that if half the bike journeys converted to cars there would only be a ten percent increase in traffic is quite clearly ridiculous. Especially within cities bikes carry volumes of people that would overwhelm roads if those people used space-inefficient cars.