So if you were an artist and interested in building and maintaining a permanent portfolio, B&W was pretty much your only option.
These people don't look ancient to me. They look like you could reach out and touch them, converse with them, share the story of their lives.
Shooting in b&w was common, because it was much cheaper. But of course, he could've chosen it or aesthetic reasons.
B&W is also standard for street and art photography.
You're gonna argue this _now_?
"The past is stupid"
Somehow this needs to be about poor constrained do-it-yourself professionals?
You can process and print B&W yourself. Color needs to go to a lab.
The consumer "street" photography of the time was mostly Polaroids, or little tiny box cameras you had developed at a booth.This has all to do with a feel, and It could be that it was mostly shot in color and converted to B&W. Or, the wonderful dynamic range of B&W could be the reason. That's fine, but it has nothing to do with lack of choice.