Another aspect here is that scientists in the 1940s are at a different life stage/might just be more generally “mature” than people of a similar age/nationality/social class today. (eg most Americans back then in their late twenties probably were married and had multiple children, life expectancy at birth in the 1910s is about 50 so 30 is middle-aged, society overall was not organized as a gerontocracy, etc).
Another aspect here is that scientists in the 1940s are at a different life stage/might just be more generally “mature” than people of a similar age/nationality/social class today. (eg most Americans back then in their late twenties probably were married and had multiple children, life expectancy at birth in the 1910s is about 50 so 30 is middle-aged, society overall was not organized as a gerontocracy, etc).
Probably wartime has this effect on people, too