LaBStar
Let's just take a few of your examples:
Pharmacists - In every pharmacy I have been in everyone wears a face mask. There is a perspex screen that customers must stand behind. In my pharmacy, only two people are allowed in at a time after they have sanitised their hands and put on their face mask.
Vets: I took my cat to the vet. I had to wait in my car and phone to say I had arrived. They came out wearing masks and gloves and took my cat in by themselves. They then brought him back to me afterwards and they fed back to me on the phone.
Care workers: My adult child is in residential care. We are only allowed to see him outdoors, socially distanced and wearing a mask. No one except the regular staff are allowed in the home.
In just three of your examples, none of the above are taking the same level of risk as teachers.