That makes sense from an evolutionary fitness perspective, but also just a social one. Consider the life outcomes of someone willing to gamble on founding a company, going out to settle a new land, or just take a social risk; compared to someone who works a mediocre entry level job for 20 years, never leaves their place of birth, or is a wallflower. The risk-taker can experience far more pronounced success or failures.

Higher highs, lower lows.