The answer
Because Jesus was anointed, dedicated and consecrated to the Lord. Even some of the monks today, who are consecrated, do not cut their hair.
H.G. Bishop Moussa
H.G. Bishop Moussa · Youth Concerns · 86
Faith Q&A › Youth Concerns › Social, Contemporary, and general issues
Why did Jesus have long hair if it says in the Bible men can't have long hair?
H.G. Bishop Moussa, Bishop of Youth, Youth Concerns (Questions & Answers). Compiled by Lisa Agaybi. Coptic Orthodox Patriarchate, Bishopric of Youth Bookstore.