Conversely I feel like it's nearly impossible to reach success at the level of most self made billionaires without having this "skill" of self delusion. How els

Conversely I feel like it's nearly impossible to reach success at the level of most self made billionaires without having this "skill" of self delusion. How else can you go forward with 110% energy if you aren't 110% convinced you are right? Self doubt in life is a healthy thing in moderate doses, but in the upper reaches of capitalistic "success" it's a downright hinderance. Just another systemic flaw in the way we award status in our modern world.