I'm just amazed, not mad.
As a childless American with 3 cars, 1 motorcycle, and 3 bicycles... I must say that plenty of folks would find your "don't have kids" comment equally bizarre.
And on the flipside, cars are cheaper than kids :)
My reading of the GP's comment was that those were not suggestions, but a mere observation, where out of many possible and viable alternatives, one is utterly dominant to the point where the others aren't generally considered as alternatives anymore.
Why is not having a car an ideal for you? Why do you have to bike? Can't you just walk places?
I don't have a car because society is telling me to have a car. I have a car because it's faster to get places I want to go; it's damn hot in the summer; and it's great for carrying around purchases and the family.