That is because education nowadays does not educate you, and teachers do not teach. If you want real teachers, you have to read philosophy. Start with Platos dialogues (which quite occasionally feature Socrates, the teacher of teachers). Plato himself was a teacher, as was his student, Aristotle, another brilliant mind, and a man that knew it all that there was to be known in his age. You can continue with other philosophers and hopefully you'll find why I said the current education system is garbage. (I didn't mention ancient philosophy for a particular reason other than that these men were also teachers and led a philosophers life. Later philosophers, as Nietzsche points out, did not do this)

Reading and understanding philosophy is quite demanding, and might have severe life-changing effects on you. Or you might get nothing of it.