You're absolutely correct. Not only did Kmt give the world mathematics, architecture, and medicene, but all major world religions, from Judaism to Islam to Christianity and even Hinduism.
But sub-saharan Afrika is a world of wonders in its own right. And we have much in the way of spirituality to learn from West Afrika. For all of Kemet's greatness, its religion, language, and empire are gone now. The West has managed to survive. Praise God.