I suppose the more experienced (and more valuable I guess) knew most dangers and pitfalls and were better able to navigate amongst them. Some people also seem to be inherently more clumsy/likely to misstep/hurt themselves and they'd get sorted out sooner.
Not that that was any good, but I don't think enough builders died to make a difference in productivity.
I'd argue you're not really considering the total $ cost of an adult human being. I'm guessing many of those who have died during poorly regulated construction projects were relatively young too, so having invested heavily in nurturing workers to that point, the potential to capitalise on decades of productivity is lost.
I'd argue that they are, but that Rockefeller era capitalists were fine replacing workers that died, to whom they likely gave little training back then
perhaps you value workers more than they did? not that there's anything wrong with that
That's the mismatch though - the costs of raising/ educating/training them and most of the opportunity costs due to their premature death weren't borne by those responsible for their safety.
Not that that was any good, but I don't think enough builders died to make a difference in productivity.