If 5 million Danes can afford to build X windmills, I don't see how 60-ish times 5 million US citizens can't afford to build 60-ish times X windmills.
Population density would be an argument (on average, higher population density means less wind power per capita), but there, New York probably has more land area nearby than Denmark.
Yes, but Danes are quite prepared to pay 25% VAT and up to 62% income tax so that among many other things, The (evil statist) State can afford to buy hugely expensive turbines from Siemens just to avoid giving money to Arabs. And those loaded Norwegians.
Americans, apparrently, while in huge numbers, in thrall to Rand/Objectivism and the Kochs, are not.
Population density would be an argument (on average, higher population density means less wind power per capita), but there, New York probably has more land area nearby than Denmark.