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.
perhaps you value workers more than they did? not that there's anything wrong with that