I was reading about Francois Truffaut’s determined attempt to self-educate himself after being failed by the French education system. He watch THREE movies a day (often sneaking in for free) and read three books a week.
Which is as good as any education, though learning from others does gives you a framework to organize and make sense of the pieces of knowledge you acquire through the process of self-education. A more sophisticated language to talk about them. A lot of pre-digested knowledge context.
But for most people, for most of their lives, self-education is the only and best way of learning open to them, and thank God for it.