> If a doctor posted a plan for passing the medical boards would your first thought be "Wow, look at that massive medical monoculture problem!"

That is fairly close to describing a well known issue with MCATs and medical school admissions, as well as boards, see [0] - note, while I'm not familiar with Pacific Standard, I felt that article gives a good overview of the issue and acts as an omnibus to a number of links of the supporting scholarly information.

[0] https://psmag.com/education/be-a-good-doctor-study-the-human...