8 “But you are not to be called ‘Rabbi,’ for you have one Teacher, and you are all brothers. 9 And do not call anyone on earth ‘father,’ for you have one Father, and he is in heaven. 10 Nor are you to be called instructors, for you have one Instructor, the Messiah.
Jesus is not telling us to literally do away with titles, but rather to not think highly of ourselves, for before God we are all the same. Better for the humble to be exalted than the other way around