I think the point is that, there are a lot of cities that are in fact sufficiently flat but do not have a lot of bike usage. Indeed I wouldn't want to bike aro

I think the point is that, there are a lot of cities that are in fact sufficiently flat but do not have a lot of bike usage. Indeed I wouldn't want to bike around in cities with many sloped streets (Brussels comes to mind) without at least having some decent gears to switch (most "grandma bikes" are single-gear, because it's one less part that can break).