You didn't come off as argumentative or unappreciative - I know you want what's best for Goofy. Remember, an infection today may not have shown up on exam, or in blood work 3 weeks ago, so please don't dismiss the possibility.
I understand that Goofy has trust issues and trips to the vet upset that...I had the same problem with my newly adopted G2 a couple of years ago. But their health has to come first. I hope that I'm not coming across as argumentative either, because I surely don't mean it that way. At least give his AV another call.