How can someone be exceptionally intelligent yet still struggle financially? Also was he interested?

I had a math tutor in college who was a few years older than me and an absolute genius at math. He could look at a problem and solve it without using a pen or paper. He was just brilliant to me.

He helped me with my statistics homework, and I paid him when I could. I always felt bad because he would help me for hours, and all I could afford was maybe $20 or even less. But I also noticed that he was struggling. He wasn’t very well kept, and I remember a small roach crawling out of his jacket one day while we were in the library.

When COVID happened, I ended up paying him to do my online tests and assignments. Later on, though, he just started doing them for free. He completed all of my online math homework and everything else. It was so easy for him, but without his help, I don’t think I would have graduated.

He told me I didn’t have to pay him back—he just wanted to make sure I graduated. I never understood how someone so incredibly intelligent could struggle financially. He did say I could pay him back by treating him to lunch

How can someone be exceptionally intelligent yet still struggle financially? Also was he interested?
Post Opinion