Few of those people in that situation would make it very far. Walking the easy routes, roads, and they are targeted by other bad people before they get anywhere. Walking through the country is extremely slow, and resource intensive. A few days and they are sick, dehydrated, and die of exposure.
Maybe a few road pillagers survive, but what are their skills? Can they butcher a cow? Can they hit a man size target at 400m? 1000m? Do they have armor, nods, radios? Do they know how to be stealthy from a lifetime of hunting? I’m willing to bet 99.9% of city dwellers lack most of these things.
I’m sure they think they would have a chance, but life isn’t like the movies.
When things get really bad, I don’t want to be in the city.