Not to mention luggage. I find it hard to believe that it’s a coincidence that rolling luggage became common shortly after curb cuts and wheelchair ramps did.
And people drag luggage around on city streets all the time. Many tourist destinations are pedestrian cities even outside their most central downtown areas. And luggage also needs to be dragged around hotels — and in suburban areas their absurdly large parking lots.
The skate wheels are a plausible argument, though.