Good question!
I, too, long for those days in which the average life expectancy was about 45 years.
I understand your point and I am all in favor of protecting people, all people, from backbreaking work if there is any other way around it.
I am simply saying that this country was built on the hard work and dedication of people willing to do any kind of work, no matter how hard or dangerous, to develop our nation. The nanny state works to break that spirit and drive.
We must have rules and laws to protect folks in the workplace. No question. But there is a line between reasonable rules and killing progress.