Why is dyeing hair black considered reprehensible (makruh) rather than forbidden (haram), and what are the proofs for that, taking into account the weakness of some narrations (hadiths) that mention prohibition, the fact that some Companions did it, and that some jurists, such as Ibn Taymiyyah, held the view of reprehensibility without prohibition?

One must adhere to what is most cautious, closest to piety, and safest. We kindly request the questioner to research the writings of jurists and commentators on hadith: Did the predecessors understand the prohibition of black dye as an absolute prohibition (haram) or as a detestable act (makruh)? And does what has been reported from some of the predecessors regarding dyeing with black have enough strength to stand against the texts indicating a prohibition? He should gather the sayings of the scholars, present them to them, and discuss with them. He should also be sincere, ask Allah to guide him to the truth, increase in night prayers, and supplicate with what the Prophet, peace and blessings be upon him, used to begin his night prayers: "O Allah, Lord of Jibreel, Mika'eel, and Israfeel, Creator of the heavens and the earth, Knower of the unseen and the seen, You judge between Your servants concerning that wherein they differ. Guide me to the truth concerning that wherein they differed, by Your permission. Verily, You guide whom You will to a straight path."