Have you ever heard of someone getting a cavity filled at the dentist, using NO anesthesia or gas, nothing at all?

My gosh! I spelled anesthesia right all by myself!

I dropped my daughter and six year old granddaughter, Brande, off at the dentist so Brande could get a filling in her tooth. I came back about 30 minutes later. They were done, all was well, no tears, no recent trauma was evident. I asked if they’d given her gas (I know it’s nitrous oxide!) Corrie said “No.”
My eyes got a little wide and I said, “She got a shot??”
Corrie said, “No.” And in answer to my blank, wordless question she said, “She didn’t have anything. The doctor gives the kids that option.” Brande said it didn’t hurt at all.
Well! Humph! The shots sure hurt! So….why haven’t we been doing it this way all along?
(I understand that if it’s bad enough, and the Doctor could hit a nerve, well, yes. You want shots or whatever.)