The ruling on a teacher specializing in a single discipline

Question:
May Allah reward you. The honorable scholar says: We observe that many lessons and lectures deal with the Sunnah and the generalities of the Qur'an, its lessons, and its exegesis. What is your opinion regarding urging the scholars and shaykhs to do this? Teaching the Qur'an is, praise be to Allah, available in the study circles and in the Qur'an memorization associations. This is available. And if the shaykhs undertake teaching the other sciences, such as fiqh, tawhid, and hadith, the sciences become complementary. The Qur'an is taught in the circles and the Qur'an memorization groups in the mosques, and the Islamic legal sciences are also taught, so the knowledge of the Muslims becomes complete.

Answer:
So it is a condition of the teacher that he teaches everything. The teacher teaches one lesson, one discipline, and so on, and the other teaches likewise. They cooperate, and each one completes what remains. This is part of cooperation. I say that the teacher must teach the Qur'an, and teach the Sunnah, and teach fiqh, and teach tawhid, and teach the language, and teach grammar, and teach rhetoric, and teach the principles of jurisprudence. Therefore, the term "specialization" should not be used in this regard. Yes.