The old men in those days saw the need for education as they felt cheated by their colonial masters, hence they made progression in bringing formal education into their culture.
Speaking from this day and time, former education has been condemned by insensitive youths with the statement, SCHOOL NA SCAM, as in the Nigerian pidgin English. However, I would love us to learn from this piece the reason we must value school since its not a scam as perceived.
From the brief history I gave, you could see that the school was accepted into the African culture to solve a prevailing problem of ignorance and also low use of the brain. African men and women in those days had lesser brain power and could not efficiently proffer solutions to problem, so rather developing in their practices, they remain stuck to a common routine and practice.
Former Education brought about intelligence and this intelligence is what the school is giving to you.
The school is not a failed system because its actual purpose was to stretch your mind and work on your intelligence until it's able to run your life efficiently to producing maximum outcome.
If why you think the school failed is because there is no Job in the society to accommodate your knowledge then check this out in you, YOUR THINKING SYSTEM. The only failure the school would have is when the thinking system of the educated and the uneducated is still the same.
Don't accommodate the mindset that school is a scam because it isn't.