It's a mildly irritating bit of hyperbole, like
this one from yesterday from Minden - town looks there and later chaser and drone footage showed the tornado hit the edge. The highly damaging core is much rarely more than a couple of hundred metres outside of extreme cases, many towns are bigger. Obviously in this case a lot of buildings will still have to go and lot of money will still have to be spent.
It'd one of those storm chaser/tornado enthusiast exaggeration things. A bit like with size - a survey may have EF0 contour a half mile wide or whatever, the actual condensation funnel they're seeing will probably be
less than what they're saying in their videos. Or the use of 'violent' to describe anything more than a little spin up.