When I moved to the USA for a few months from Europe, I was surprised by the fact that you simply can't walk to places. There are so huge spaces between things except for maybe city centers. (I was mostly in CA and FL)
Yes, this is very true. That is how European cities from US cities. In Europe cities are built for pedestrians, in US for cars. All these US suburbs areas with one-store buildings are making transportation ineffective because the US city is often more spread. However, there are some positive things happening, like walkability studies in US cities. Hopefully, that will help in the near future.