IDK why Crystal other than they just take the vets word for it and don't research further.
I was just at our vet this morning, the vet was one the phone telling a client...."Daisy is due for her boosters on May 15th". I wanted to ask him why he still insists on yearly boosters, but knew the answer already....Money!
Until the ALL vets get on board with newer vaccine protocols, I don't see the situation changing. All we can do is try to educate through talking to our friends, familes, etc. and of course educating here.