The passage is embedded in a lesson Jesus is giving about the Pharisees and about how they like to be admired and were far from holy or humble men. They like to be called "rabbi" he says, don't do this yourself. Meaning don't be flattered or be impressed with such. Don't go out looking to impress people with your holiness. Don't be hypocrites, but rather be humble followers.
That is what it means. It was never meant to be a blanket prohibition against saying verboten words. Good grief, even Protestants send their kids to Sunday School where they learn from "teachers."
St. Paul refers to himself as the Corinthians "father in faith," and it is exactly this relationship which leads to Catholic priests being called "Father." If we are wrong to use the naughty word, then so was Paul.
SD
Ya Jim take Matthew 1;25 for example.