He was the official photographer for Gerald Ford. I remember listening to him talk at the Portland City Club explaining why he used B & W film for his work as being better able to pick up nuances and expressions.

Certainly it was faster, able to gather more detail in less time, a far better choice for candid shots. Kodachrome was beautiful but fussy. Slow, requiring a lot of light. Ektachrome, when it came along, was far better but the color was not as true or vivid as Kodachrome.

I guess my point is that in situations other than those completely controlled such as movie sets there was a lot to be said for B & W.