This is not what the post to which you're replying is advocating, quite the opposite. People in big cities get far more exposure to "the world" than outside of these centers, mostly because the world comes to them every day.
There's something to be said for the sadness of not having the money to travel the world, but that doesn't seem particularly better for people out of cities in my experience.
And probably most of the people I know live in smaller towns outside of (many quite a way outside of) major cities or in/near smaller cities and many travel a great deal.
My assumption would be that the amount to which someone travels is fairly correlated to their income, adjusted for local cost of living? I'm not sure where that would be higher though.
I can't get the land in city at affordable price.