In Terry Pratchett’s novel Doger (which is not one of his hugely popular Discworld series, but is well worth reading,) Pratchett says of his title character, who may or may not have been ‘Artful’ in another literary incarnation, “While some people were in school being educated, Dodger was in the streets learning stuff, there’s a big difference.”
Experience has taught me, with my education that started in an elite school and ended with a very mediocre collection of rag bag qualifications because I simply lost interest, that people with PhD level degrees and pisspots full of credentials are often useless outside their very narrow field of expertise and even in that have little understanding of the practical applications of their knowledge.
In other words being big on book learning and short on life experience rarely makes good combination in commercial terms.
The theory behind the renaissance education, which aims to give pupils a broad base in early life, so that they can specialise later seems to work well. Most of the enlightenment era polymaths had the benefit of this approach.