If box plots require an formal and accredited statistics course to understand, but as you mention they are taught to 15 year olds (presumably incorrectly) in sc

If box plots require an formal and accredited statistics course to understand, but as you mention they are taught to 15 year olds (presumably incorrectly) in school and used by people with power making decisions that affect everyone in organisations such as the UN and NASA, then even if the author is unqualified it seems their point is 'accidentally' correct. No one should be using these plots except extremely smart and trained people who do know how to read them, as it could have serious negative consequences.