Two minds, two destinies
Before you decide whether the two dads in the title are real or just a teaching device, it helps to treat them as two voices living in your head every time some extra money lands in your account.
One voice asks whether the choice is safe, and it bets on a degree, a steady job title, and a career that climbs slowly. The other asks whether the choice makes you freer, and it looks at every dollar as a seed, not a trophy to show off.
You don't need to kick either voice out of your head. The book's exercise is to notice which one yells loudest when it's time to spend, and to remember that it was installed in you long before you could choose.
