That's interesting, but I'm unsure how much we can generalize from some photos. For example, I wonder how much "photogenic bias" [0] and survivorship bias exist

That's interesting, but I'm unsure how much we can generalize from some photos. For example, I wonder how much "photogenic bias" [0] and survivorship bias exist in such photographic evidence. How many photographers of the time would take a picture of a hallway of private offices? And what editor would keep such photographs for posterity? [0] There's probably a better term for this...