i strongly disagree with the author. you cant ignore sunk costs.
For example, in the stock market the majority of active retail traders (>90%) get wiped out within 3 years. they continue to dump money into the market, ignoring losses (sunk costs), hoping that the next trade will help recover the losses, and then the next trade, the next ... etc. at some point one has to stop "bleeding" and re-evaluate the approach before blowing out trading account completely. this plays out in the stock market every day and will continue for as long as trading exists. one cant ignore sunk costs - we have to learn from it.
To be fair trading is a zero-sum game with extreme information asymmetry between players. Business/investment is mostly positive-sum. I don't think we can extrapolate lessons from trading to the real world except the lizard-brain human psychology of it all.
You can have a trading strategy that loses 999 trades but hits the jackpot 1/1000 times, and you can still lose all your money because you don't have infinite capital. In business you can try an outlandish moonshot and increase your odds of winning every day because your work gets you closer to the goal. (And typically your business goal isn't to take money from resourceful hedge funds on the other side of the trading desk, so it's a little easier.)
For example, in the stock market the majority of active retail traders (>90%) get wiped out within 3 years. they continue to dump money into the market, ignoring losses (sunk costs), hoping that the next trade will help recover the losses, and then the next trade, the next ... etc. at some point one has to stop "bleeding" and re-evaluate the approach before blowing out trading account completely. this plays out in the stock market every day and will continue for as long as trading exists. one cant ignore sunk costs - we have to learn from it.