There was a sign with an arrow pointing to a waste bin at the entrance to my doctor’s office. It read, “If you are wearing gloves, take them off now. Gloves are intended to prevent cross contamination. They collect contamination and carry it with them. This is why doctor’s change gloves so frequently. You are better off just washing your hands more frequently.” This wasn’t some hand written sign. It was printed on plastic and they probably bought it from a medical supply house.
As to masks, I think the same applies. A doctor puts on a mask for surgery, then replaces it when he gets to the next patient. (At least, my doctor does. The office help is wearing any old thing with many of them wearing it below their nose or hanging from a strap.) You can tell the office staff has had it with wearing masks all day.
By phone, I told a pharmacist, “It sounds like you need oxygen”.
Also, during a long surgical event, they will most likely change masks more than once. No doctor would wear the same mask for 8 hours straight.