What is the benefit of researching the topic of "Are disbelievers addressed by the branches of the Shari'ah," given that we know they are eternal in the Fire?

Question:
He says: Honorable Shaykh, may Allah grant you success. We find in the books of usul al-fiqh (the principles of jurisprudence) and 'aqidah (creed) a discussion titled: "Are disbelievers addressed by the branches of the Shari'ah, or are they not addressed?" The question, Honorable Shaykh, is: What is the benefit of this issue according to the Salaf (the earliest generations), if the disbelievers are in the Fire?

Answer:
Yes, this is the position of al-Shafi'i (may Allah have mercy on him) that disbelievers are addressed by the branches of the Shari'ah, and the majority hold that they are not addressed. The benefit is that if it is said they are addressed, their punishment is increased; their punishment is increased for their kufr (disbelief) and for their abandonment of the obligatory acts. And according to the view that they are not addressed, they are punished for their kufr (disbelief); they are punished for their kufr (disbelief), and may Allah protect us from that, and the punishment for kufr (disbelief) is severe. Yes, the benefit is clear, but the disagreement exists. Yes.