Agreed.
It is perhaps necessary to be completely comfortable with the surroundings. To those who have not found complete comfort with nature and would be concerned about things like twisting an ankle ( as if you couldn't do that on a curb or broken sidewalk ) it may be difficult to enter this mindless state in nature.
What is very odd about the absolute focus on _in the cities_ is if you were to switch that with _in the desert_ or _in the hills_ or _on the mountain_ the feelings the article is describing are very similar to the sense I have when I have actually left it behind and am now 'lost' if you will in my surroundings.