The netherlands has increased its area by an extraordinary 25% by reclaiming land from the sea.
Despite this the netherlands is one of the most densely populated countries on earth.
It has further increased its population by allowing immigration on a large scale, which whatever else its consequences is not going to reduce population density.
Now if you look at a nightime satellite view of Europe, the Netherlands is an uninterrupted patch of light.
I'd rather live in a country where I have the possibility of escaping from my fellow man every once in a while. That's not possible in Holland so I'd rather not live there.
I can, however, see why cycling is popular/necessary there