I recently met a man who was limping badly from an injury that day and couldn't put any weight at all on his heel. When I wished him good fortune for when he had time to see a doctor, he started a several-minute forceful explanation that he distrusted doctors because of his problem with the wording around doctors: doctors "practice" medicine.
He described himself as a professional at his trade, and that he wouldn't hire or work with anyone in his trade who was just practicing. So he doesn't trust doctors because they're not professionals, they're merely practicing. I hoped he felt better anyway, but the objection to the wording of general usage was odd to me.