The middle class believes a little too much in formal learning. Unfortunately, a one-size-fits-all model can never make you excellent.
Hence, most excellent people focus on self-chosen learning.
Examples: Leonardo Da Vinci, Edison, Einstein, James Watt, Charles Darwin, Benjamin Franklin, Lincoln, Elon Musk, Bill Gates, Steve Jobs, Dhirubhai.
Let me also take a fictional example to show you the power of self-chosen education. Take a look at what educational choices Sherlock Holmes made for himself:
Great men don’t let others tell them what to learn. They pick their own learning portfolio!