Hakim al-Umma Mawlana Ashraf ‘Ali Thanawi (may Allah have mercy on him) stated,

“Our deen is systemized through taqlid.”
(Ashraf al-Jawab, 161)

As for the proofs of taqlid shakhsi, Hakim al-Umma has said,

“There is no need to present any proofs with regards to taqlid shasksi (because it is compulsory due to external factors.) (And when something is compulsory due to external factors), then it itself is not emphasized; however those things which are emphasized in the Qur’an and Hadith usally cannot be practiced upon without it. Therefore, it is also deemed necessary. The pre-necessities of an obligatory is also obligatory .” 

(Tuhfat al-‘Ulama 2/291)
From Darul Iftaa, Madrassah In’aamiyyah