Mormon’s yearning for his brethren captures something very important, I think. Mormon is willing to include the small plates for whatever private reasons God may have, but he hopes, he prays, that it may have something to do with restoring his brethren to their God. This yearning and this type of prayer can be found elsewhere in the Book of Mormon.
And apparently beyond Enos, his fathers prayed for the same thing. Jacob? Nephi? Lehi? We don’t have specific record of these prayers, but we know of their own exortations and yearnings for their family members.
And their prayers were heard.
Perhaps we could add that long before Lehi, Joseph of Egypt forsaw his descendents needing a book and a seer to translate it, and that “the words which he shall write shall be the words which are expedient in my wisdom should go forth unto the fruit of thy loins.”
And Abraham himself was promised that God would remember his seed, continuing to reach out to them, and preserve remnants……