I used to think it was because 'cardo' in Latin means hinge, therefore the title was a hinge between the Christian name and the surname. But I was wrong. When I researched it I found conflicting reasons for the placement of the title after the Christian name. One often given is that it's supposed to be a sign of humility to be referred to by Christian name before title.
Why is the New York Fire Department known as FDNY.
In my experience, wanting to be addressed by title rather than by name has not been a sign of humility. However, old customs don’t always translate.
I’ve never known a Bishop or Archbishop to object to being called “Father” or “Bishop.” Our retired Bishop, “Bishop Emeritus,” was at my parish recently and was making a fuss over my baby, because she’s the cutest pink thing in the world. “Thank you for your blessing, Bishop!” and he wasn’t looking for more titles.