Titles can bring confidence in those who are needing help from that person. It means that person has credibility.
Titles bring respect, a recognition that the one with the title is in a more knowledgeable position that the one coming to see them.
Titles can release the person to serve better because it gives the authority perhaps that is needed.
On the other hand …
Titles are all people have left when their ministry/office/work is fading.
Into a culture of hierarchy and religious power, Jesus says to the crowd and his disciples:
“But you are not to be called ‘Rabbi,’ for you have one Teacher, and you are all brothers. And do not call anyone on earth ‘father,’ for you have one Father, and he is in heaven. Nor are you to be called instructors, for you have one Instructor, the Messiah. The greatest among you will be your servant. For those who exalt themselves will be humbled, and those who humble themselves will be exalted.” (Matthew 23 v 8-12)
We never stop being a disciple, so don’t call yourself Rabbi.
We never become God, so don’t call yourself father.
We never master anyone, so don’t call yourself instructor.
Never magnify yourself over someone else.
Missions Paul 