I apologize if this list of counterexamples ran too long.
I apologize if this list of counterexamples ran too long.
What G.K. Chesterton said is that, if you can't make an affirmative case for the tradition's origins and show why the cause no longer applies, you should leave the tradition in place.
In the listed examples, rationalists celebrate this principle with examples such as the bitter cassava preparations of the Tukanoan people, which were very labor- and time-intensive. A much shorter processing would have eliminated the obvious, short-term toxicity of the plant, so someone scientific experiments to determine how much processing was actually necessary would likely end up damaging themselves and their reproductive prospects in ways that wouldn't show up for years or decades.
So there's evidence that the rationalist community actually appreciates tradition more strongly than the average person, and searches harder before discarding it.
"The Secret of Our Success" literally starts with how European explorers starved to death in environments that other humans thrived in because they lacked the cultural knowledge local hunter gatherers had, includes many other examples of how pure reason can be counter-productive to survival, and ends with a warning that the idea that now it's finally different may not be true.