There is another possibility: the selection process for experts eliminates diverse perspectives.
Try getting tenure as a political scientist as a conservative republican, as an example.
But there are more subtle problems. For example, the selection process for medical doctors actively screens out people with a high level of mathematical and statistical skill, knowledge and ability.
It does this by very strongly selecting for other characteristics—ability to memorize vast arrays of words and facts, physical and mental stamina. Because if you strongly select for X, it will generally be at a cost to anything else that is not strongly correlated with X.
There is another possibility: the selection process for experts eliminates diverse perspectives.
Try getting tenure as a political scientist as a conservative republican, as an example.
But there are more subtle problems. For example, the selection process for medical doctors actively screens out people with a high level of mathematical and statistical skill, knowledge and ability.
It does this by very strongly selecting for other characteristics—ability to memorize vast arrays of words and facts, physical and mental stamina. Because if you strongly select for X, it will generally be at a cost to anything else that is not strongly correlated with X.