What is the ruling on learning the science of tajwid?

Question : The questioner says: We find in the books of tajwid the phrase: "This noble science is that tajwid is an individual obligation (fard 'ayn) for whoever reads the Qur'an."

Answer : Yes, some scholars of tajwid (may Allah have mercy on them) held that tajwid is an individual obligation (fard 'ayn), and that it is not permissible for a person to read the Qur'an without tajwid. However, this view is weak. The correct view is that if a person establishes the letters with their grammatical cases and diacritical marks (i.e., with their dots), he has recited the Qur'an in the manner required of him. Tajwid is nothing but an embellishment of the pronunciation. It is not valid to argue that tajwid requires a person to produce the letters from their points of articulation, because that is included in the grammatical correctness of the letters. Indeed, if one says "Alhamdulillah Rabb al-'alamin" without the proper recitation, he has not recited it as Allah revealed it. Or if one says "Alhamdulillah Rabb al-'alamin" [incorrectly], he has not recited it as Allah revealed it. As for what occurs regarding nasalization (ghunnah), assimilation (idgham), and the like, that is an improvement of the pronunciation and is not obligatory. Otherwise, we would be sinning the majority of Muslims, because the majority of Muslims do not read the Qur'an with this level of tajwid.
Moreover, it was reported from the Prophet (peace and blessings be upon him) "Allah, al-Rahman, al-Rahim." According to the rules of tajwid, these words are not elongated except for the last one, which is elongated with a temporary elongation due to stopping. This indicates that not everything that is established in these rules is entirely correct.