Lots of very different strawman situations are being described. Sure if you've built expertise and experience in an area of effort (athlete; scholar) then you h

Lots of very different strawman situations are being described. Sure if you've built expertise and experience in an area of effort (athlete; scholar) then you have to balance that against the cost of starting over somewhere else. But if you have only spent time and money, and have nothing to show for it? Then 'sunk cost' is indeed a fallacy. Nothing to see here folks; move along.