According to Mormons, why didn’t Jesus and the apostles restore the lost ‘plain and precious things’ to the Old Testament?

### Background Mormons believe that the Hebrew Bible was corrupted and had lost many important prophecies and doctrines pointing towards Mormon theology, which were eventually restored by Joseph Smith such as “Genesis 50:33”: > 33 And that seer will I bless, and they that seek to destroy him shall be confounded; for this promise I give unto you; for I will remember you from generation to generation; and his name shall be called Joseph, and it shall be after the name of his father; and he shall be like unto you; for the thing which the Lord shall bring forth by his hand shall bring my people unto salvation. ### Question Did Jesus and the apostles leave the church with a defective Old Testament which lacked important Mormon teachings? Why didn’t Jesus and/or the apostles fix these supposed corruptions in the Hebrew Bible and provide the new church with an accurate reading of the text?