Health, Habits, Physicians, Nail-biting medical specialist

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Today I went with my wife to a urologist referred to by her primary care physician. His office has two walls with impressive credentials - diplomas, degrees, honors, medical and hospital affiliations, etc. When going over my wife's history, I happen to notice that the urologist's fingernails looked bitten. Then, while at his desk he actually started biting his nails while conversing with my wife and me, which completely flabbergasted me. To be candid, I am a severe nail-biter. As a kid, I was told by my elders - parents, teachers, doctors, the school nurse, etc. - not to bite my nails because it is a filthy and I could pick up all types of bacteria, viruses, and parasites. My biology teacher said I would get worms if I didn't stop. To this day, I always have a semi-conscious fear of picking up something because I know the habit is not sanitary. Despite my own bad habit, I was grossed out seeing this medical specialist- who physically examines patients, fingers their private parts, collects urine samples, regularly visits hospitals, performs surgery, and treats diseases - with bitten nails, and was even more nauseated watching him do it in front of my wife and me who were seeking his medical advice. I would like to know what others think of my reaction to this event. What do you think of a medical doctor who bites his nails? Would you want to be treated my him? Would you be disgusted to see him bite his nails, particularly in front of you? Am I being overly judgmental, particularly since I am also a nail-biter?