Why do Jehovah's Witnesses think there is zero difference between Almighty God and Jehovah, YHWH, I AM?

Isn't it painfully obvious that it was God who made the covenants with Noah, Abraham, Hagar, and Moses and the Lord God who appeared face to face with the 74 elders of Israel? Isn't it obvious that the angel of Revelation is not the Lamb or the Father Almighty? Isn't it obvious you need to read the Song of Moses and the Song of the Lamb? Isn't it obvious that Moses worshipped the Lord God, Jehovah, the Living God as his God Almighty? Isn't it obvious Moses didn't know the distinction between Lord God and God?