That’s just what Eliezer is pointing at with “Choosing to be Biased”. In practice, it’s impossible to determine causality between beliefs and “success”. There are lots of successful people with all kinds of utterly insane beliefs. Were their insane beliefs the cause of their success? Or were these people so talented that they were able to achieve success despite those beliefs?
In contrast, determining whether a belief results in good predictions about the world is quite easy, and gets you many of the benefits without any of the potentially catastrophic costs.
With all of these anecdotes, you should ask yourself, what did people do before they had cell phones? Cell phones aren’t that old! It’s not like the 1990s and early 2000s were some pre-civilizational state where people just couldn’t coordinate or make decisions for lack of instant communication across vast distances.