Your portfolio lost 26% of its value that year, and losing 1/4 of your life's saving isn't something most people are ready to stomach, especially when they need it the most (year just before or just after retirement, typically).
At the same time, Browne's allocation lost less than 1%. Since 2007 it had just one really bad year (2022, -13%, and even then it wasn't as bad as the above allocation), other than that, it was always positive or close to zero.
A simple portfolio that almost never loses money and still has a decent, yet significantly smaller than its competitors, CAGR. That's a pretty good option for very conservative investors, IMO.