So people that exercise everyday would die faster then?
Well, there apparently is _some_ evidence that people who engage in extreme exercise regimes do indeed have higher mortality rates than those who exercise more moderately. Not sure how strong that evidence is though. They probably argue about that in the health and fitness forum.
But we are talking about _work_ not 'exercise'. Those aren't the same thing, are they? People do exercise out of choice, and often enjoy it. I've cycled huge distances occasionally, I wouldn't have called it work, it was fun. Which brings me back to the sad fact that I literally am not sure if I know the meaning of 'work'.
I mean playing computer games is 'work' if you are one of those (Korean?) guys who play on-line games for days at a time to 'farm' in-game items for cash. So I guess 'work' by definition is something you only do because someone pays you for it or because you have to do it to get food or some other external reward. Indeed, 'work' might not involve much physical exercise, it could even involve having to endure a situation where you can't get much physical exercise (lorry drivers and taxi-drivers have a high rate of heart disease, for example).
And it seems obvious that historically people have had their lives shortened because the jobs they had to do to do that, were hard and possibly dangerous and possibly involved neglecting their health. Including 'jobs' that were in extreme circumstances, like prison camps.
Hence I don't think its really true that 'hard work never killed anyone'.
This was a lot of work to explain a passing throwaway thought.