I wouldn't pay too much attention to this, it's 30+ years old and the source data older still. That was the generation which had steak and eggs for breakfast, pastrami for lunch, more steak and potatoes for dinner, and washed it all down with a bottle of bourbon while smoking a stogie. And the last time they exercised was in the Air Corps back in the Big One.

Boomers, and especially Gen X and later, live quite different lifestyles today, as a demographic.

I do think there are some aspects of our jobs which have detrimental health affects, but I think the net benefit of a high-income lifestyle offsets that.