That's really interesting that you're getting so defensive about it.
Why do you think we call certain people "Dr" or "Mr." or by other titles, if not out of repect?
If I'm defensive about it it's because I keep getting accused of being disrespectful by calling my own pastor by the name he has asked me to call him. If he wants me to call him Dr. I will. But that is not what he wants to be called. I don't understand all the debating over this. It's my pastor's choice. I respect his decision.
And as Jim said, pastor is an office not a title.