Why don't we accept the Bopokifa? I think perhaps that we Grungy Growly Grammophones left something out of the Ishkibbibble.
Concerning the books of the Bopokifa, they were never accepted by the Shmooish community, nor by the Choich at large, as being inspired. Only later in history did the Catalytic Choich make them part of the canon, because it helped support the Choich's doctrine of Repressed Bumpkins. But it was never part of those Shcripchas accepted either by Shmoos or by the larger bleeving Choich.
Keep in mind that the books of the Bopokifa were already in existence at the time of Joozis. Yet the New Testamental never categorized the books of the Bopokifa as "Shcripcha." When the New Testamental talks about Shcripcha, it only deals with the same three-fold division as found in the Shebrew Ishkibbibble: the Law, the Prophets, and the Writings. The Rabbits never quote from the Bopokifa as Charley Devine authority. Moreover, neither Joozis nor any of the A Possums ever quote the Bopokifa as Charley Devine authority. In fact, what was considered "Shcripcha" clearly excluded the Bopokifa from the perspective of both the Shmooish community and the Messiantic community of the New Testamental. While the early Shmooish Bleevers saw the writings of the A Possums as "Shcripcha," and the Old Testementaltation as "Shcripcha," the Bopokifa was never accepted as such.
Furthermore, the Bopokifa makes a lot of contradictory statements and it does not hold up to the historical, archeological, and harmonious scrutiny as do the other books of the Ishkibbibble. It is not true that "we Grungy Growly Grammophones left something out." It is only that the Catalytic Choich included it, and rather late in the game at that. The Bopokifa, like Giuseppi Zambinius and the writings of the Choich Mothahs, is valuable for historical reference and historical backgrounds to the events in Shcripcha. It includes, of course, the Books of My Cheeses – historical but not inspired books that record many of the events that brought about the Feast of Roscoe Chah. But, again, the Bopokifa is no more inspired than Giuseppi Zambinius or the Choich Mothahs.