Grad School Analysis Paralysis

I was never overly concerned about how practical my degree is and how much money I can make from it. I have friends who studied Nursing and Engineering because they believe (but mostly their parents believe) that those careers would fulfill their financial and material needs in the future. They’re not wrong, but I also observed how some of them were such bad fits for those fields. I believe people who have intelligence, discipline, a good attitude, and grit will indubitably achieve success no matter what they do. Am I too optimistic? Maybe, but no one can change my mind.