Regrets are hard to measure - the things you didn't do are usually hypothetical and often only occur due to perfect hindsight - using information you didn't hav

Regrets are hard to measure - the things you didn't do are usually hypothetical and often only occur due to perfect hindsight - using information you didn't have at the time you made your choice. Optimising for immeasurables is not a good path to success in my opinion (and I have some external measures of success in my own life, plus some failures).