I don't get the last bit, is it really better for traffic for me to Uber to a shoestore that may be several miles away from me, than to use Amazon Wardrobe to t

I don't get the last bit, is it really better for traffic for me to Uber to a shoestore that may be several miles away from me, than to use Amazon Wardrobe to try on some shoes? Services with free return shipping have been invaluable to me as a college student who doesn't drive, since I can just walk down to my campus mailroom. I suppose that as someone who primarily receives shipments at a centralized location (a campus mailroom) then additional shipments don't really have a marginal cost. This article mentions New York City, where I assumed that a lot of people already lived in places with a centralized mailroom (at the base of buildings). Maybe the problem is with smaller residential buildings that disproportionately contribute to traffic?