Only difference is that he wasn't a financial/option genius like Scholes. Those people at LTCM did this for a living.
But you bring up a good point. Smart people in one category often think they are smart in several other categories. [cough] Elon Musk [cough] That usually leads to hubris.
smart folks are so used to being "right" in every day life they cant stand it when mr. market tells them they are wrong...so they hold or worse yet, add to the losing position until they are both the smartest & poorest person in the room.