People who are successful often don't understand what made them successful.

The individual does things for idiosyncratic reasons, but the environment selects for strategies that are viable in practice.

There isn't necessarily a clear, easy-to-understand or narrativizable reason for what ends up being viable.

The result is that you get lots of successful people who have no idea what made them successful.

The thing they think they're doing and what's actually load bearing is likely different.