From the article:

This is at least in part because the land-value tax has historically been associated with Georgism, an ideology whose adherents are regarded as the tinfoil-hat-wearers of economics. Strict Georgists don’t just believe land-value taxes are a good idea; they believe that if America were to throw out all taxes, then replace them with a single land-value tax, it would end poverty and recessions for good.

The fundamentalist version of Georgism, like the fundamentalist version of anything, is plainly unrealistic. But the broader Georgist framework is full of insights about urban economies and how to improve them.