All of these arguments apply in guerilla warzones (eg. Vietnam, Iraq, Somalia) and while insurgents there have certainly been capable of inflicting casualties and denying the U.S. its strategic objectives, they also couldn't stop millions of their countrymen (and usually themselves) from being killed. Winning is cold comfort when everybody is dead.
Except the Vietnamese were not living among the Americans in the same cities. That would've complicated matters a lot. Would we have carpet bombed Chicago? Napalmed people hiding out in Yosemite?
