1. The "faithful Catholics" who attend the Novus Ordo are a small, small minority. Maybe 2% of them. They can at least be trusted with the basic tenets of the Church and would be open to Tradition. It's a very, very small number, as is the number of people that attend the NO that believe in basic tenets of the Church to begin with.
2. No "faithful Catholic" could have anything to do with that physician, no matter what any group thinks. I've had the misfortune of meeting people like that.