Icarus2001 your arguments and cost estimates are way too simplistic. Your numbers look at one persons flight training in isolation, this is a small part of the overall cost of losing another pilot. At the very least it does not factor in the cost of failures of new-joiners or upgrades, not to mention the family stuff.
We may think of ourselves a bit too highly, but by the same token you should not cherry pick one cost to make an argument about how insignificant we are