At 284, Boulder, CO is considered a "city". Don't get me wrong, it's a nice town, but you can't compare it to Austin (11), Portland, OR (25) or NYC (1). Top 100 cities comes to ~64.5m (Spokane, WA coming in at 100 with 219k).
I just... wow... I don't know why, but I truly thought "city slicker" America made up like 50%+ of the population. At best it's 29%. Not insignificant. But... not a wide majority.
Then take Wilsonville, OR. It's oddly considered a metro area for Portland. It's a good 30min away and independent AF from Portland. Plus the people there are different. More old money or straight up white trash.
Metro is a really loose/gray term. To say surrounding towns are the exact same as a city is a bad idea. Let's take the purchasing decision of a home in those areas. The "value" of location compared to price and are at odds. One person is willing to pay a premium for location, the other is not. Those are two different mindsets as to what that person is willing to deal with in life.
And the overall lifestyle of a place depends on the population within a reasonable radius of travel, not what is within an arbitrary boundary.
I live in an area of NY currently that has towns similar in size to where I went to school in AZ, but the surrounding area, say a ten mile radius, has maybe three times the population. It's a very noticeable difference, both in general lifestyle and in employment opportunities, education and so on.
Yes. Maybe you can understand some of the frustration coming out of "middle America"? The new American economy is booming in large metro areas, while the rest of the country stagnates. I'm not a Trump voter, but I certainly understand the bitterness at being economically and culturally dominated by a segment of the country that is at the very most, 50% of the population.
*I think Austin is the smallest mentioned.