On the contrary, many people who received high grades end up being awful investors. These people are like Michael Jordan who thought he could transfer his skill on the basketball court to the baseball diamond. He found out the hard way it was not that easy. The skills needed to be a great or even competent investor are not taught in school. Your report card is no barometer of your future wealth.
From Morgan Housel,
26. You aced your SATs and went to an Ivy League school. You think this qualifies you to be a financial genius without realizing that the single most important skill in finance is control over your emotions, not control over a Greek formula.