It's almost a moot point in his case. The Belgian "countryside" is all towns and small cities. Every bit of it should be served by some kind of transit. It's only about 350km the long way across with a population of almost 12 million. There's hardly a hectare in it where you aren't a bike ride from a town center. Even in the dead center of Hodge Kempen you're still adjacent to small, fairly dense town.
He just falls for the typical false dichotomy that you're either in the "countyside" or you're in a major metropolis. When the reality is, most people live in small towns and small towns are still urban.
He replied to a guy talking about the states and applied just completely wrong standards of what both what good transit and the countryside are because his own experience doesn't map to what the other guy was talking about.