Jobs are almost entirely less physically taxing than they were. 32 years ago I was still a day’s pay miner. Those few underground mining jobs have more equipment operating than was imagined possible. That is progress but it has its cost. Plus, what % of the workforce are steelworkers today, for instance.
Ditto that, when I started my first job (1960) was delivering furniture, refrigerators up stairs and whatever, I was 120 lbs soaking wet. real work.