Well first of all, the 15 minute concept is nothing new.
And having spent time in places that afforded you to walk everywhere you needed to be I can tell you flat out, that it's a nice way of living. It's the original concept of a city.
San Antonio (as an example) is not a city. It's a giant schit hole sprawled out over hundreds of miles. It's a perfect idea of what putting huge groups of people together should not be.
Second of all, the idea that compressing lots of people into small areas makes them more easily controlled and less dangerous is silly. Those are actually the most dangerous situations you can create. Look at the history behind Hue, Fallujah, and of course Gaza. It is a horrible concept if you're trying to keep tabs on people. Matter of fact this very concept is what gave root to some of America's largest criminal enterprises. Ever.
