There are several current threads in which people want to "visit" a lot of cities in a few days. Why?
I used to be that people who traveled carried their things in trunks, upon which they affixed decals of all the places to which they had been, so they could show others how "well traveled" they were. Is that what these people want, to brag to others about how many places they have been in? Of course, they weren't there long enough to really see the city, or to know anything about it, but THEY WERE THERE!
In terms of personal enrichment, I think it is necessary to stay in one place long enough to understand it.
When my wife was in college, she took a "birdseye" tour of Europe, the classic "if this is Tuesday, it must be Belgium" tour. She saw a different capital city every day, and took a picture of the hippies around the fountain in the town square. When she got home, she could not identify the location of any picture.
So, what should we call these people or what do we call their method of travel? Madness? "Decal collectors" is kind of obscure. Someone once said this is "Blink and run" tourism. I call this "quantity, not quality". Or maybe we should call it a "Vanity trip", because they don't care anything about where they were, they just want to be able to say they were there.