I won’t go into an halachic analysis because this is not the right venue but to paraphrase what the Brisker Rav said about this question, the amount of effort and depth it would take to understand Nach properly would make it into a primary area of study.
They type of places which focus on Nach rarely produce serious Talmedy Chachomim. Even their seforim on Nach are rarely learned. Conversely the type of Talmedy Chachomim who are major experts in Nach (like Rav Yisroel Reisman) did not spend their Yeshiva or kollel years focusing on Nach.