Isn't that almost exactly what, say, the s&p 500 returns? [0] And you don't need a team of anyone to buy and hold that.
[0] https://www.investopedia.com/ask/answers/042415/what-average...
[0] https://www.investopedia.com/ask/answers/042415/what-average...
If the S&P 500 falls 10% in a given year, I can hold 100% cash, light 5% of it on fire, and outperform the S&P 500 - that doesn't make it a sound long term strategy.