Firing the dentist is not an option, they all are the same, but instead I instruct specifically not to use any products containing fluoride beforehand.
Discussion
My wife fought with the dentist every time we visited about not using fluoride.
Eventually she found a biological dentist that does not use fluoride. It is a bit of a drive each time.
Here is a good explanation of Biological Dentistry.
https://whiteclinic.pt/en/biological-dentistry/
We replaced out toothpaste with fluoride with hydroxyapatite.