It's not a healthier better way to build a city its a tiny park on a corner lot surrounded by pollution and traffic.
Second: the point is not to build "a larger scale" version of those societies, but actually to replicate the idea of localism in many different places. Less EU and one-world government and more independent nation-states, if you will.
Third: you can oppose the lifestyle and philosophy all you want, but it still is not slavery.
Pretty much how all similar communist experiments had to change their country into a prison so that a "dreamer" such as yourself can have his "perfect" society.