Undeniably true, but honestly, what's your point? The OP's words were "the best America's got." I think in the context of the conversation we were engaged in, a suggestion as to what is the greatest city we have in general, or the greatest city we have in terms of public health, might both be interesting. I'm surprised by these "who cares about how good a city is, mannnn?" comments.

The top ten metro areas have about 25% of the total population.

So, not a majority, but an absolutely massive number of people.

And that myopia goes both ways.

I think very old, classic measures like economic activity, the number of great works of art that come out of a place, the influence of a city on its surrounding region and its world, and the progress toward better public health and safety measures (highly relevant here) are a lot more quantifiable than one might at first believe.