Academic disciplines are a little weird in my mind.
A biology teacher teaches biology. Whether s/he is a "biologist" or not is up for grabs.
A sociology teacher teaches sociology. Whether s/he is a "sociologist" or not is open to question.
A philosophy teacher teaches philosophy ... and yet is often unblinkingly referred to as a "philosopher."
This last leaves me scratching my head. And I guess the same thing is true for spiritual discipline. Is anyone a certifiable Christian because they teach Christianity ... or a Buddhism teacher a Buddhist?
It's a somehow-sour note in my musical lexicon... close, perhaps, but in the old carnival-speak, "no cigar!"