"Education is the best legacy", this statement is very true and it remains one of the most popular statement in the world, but at a point, we do mix things together and apply the quotable quote in the wrong way.
When I was very young, I remembered we learnt in Social studies that education can be classified into two; the  formal and the informal education.
Informal education was defined as "an education gotten outside a standard school setting", if I could broaden it, it may mean, the skills you got at home, from vocational centers or from your friend, anything addition you got from outside the standard school setting.
Source: https://www.entrepreneurshipsecret.com/5-college-dropouts-who-rules-the-business-world/