Nope. Everyone had one on, unless the patient had their mouth open. I wasn't even allowed in the building until it was my turn to sit in the chair. They brought any necessary paperwork to my car and came back out to get me.
When I went to the doctor they didn't allow me to enter the room until I answered some questions about how I was feeling. Both checked my temperature, The doctor's office made me use hand sanitizer. Masks were required in both places.
Because we know how people get infected with the virus. If we follow that then it becomes more difficult for the virus to reach it's destination. If the masks shortens the distance of the spread, then it becomes more difficult for the virus to infect. If you wash your hands and or use disinfectant often then you make your hands a more difficult environment for the virus to survive in. If you don't go anywhere then you reduce the risk by cutting down the number of people that you are exposed to.
So regardless of the environment. You have made it more difficult for the virus to take old. Not knowing the risk is also a risk. Sort of like randomly having sex with people not knowing what they may or may not have. You don't know what the risk is, but you can do things to help protect yourself in the event that you become exposed.