I get what you're saying, however if you do want to have more scaley friends in the house you should start to work on that anxiety or you'll have a heart attack or a mental breakdownI'm not saying to let your guard down, that would be a mistake, but to make the right decisions, follow the right procedures (always) and be confident about your choices.
Regarding visiting expos/petshops/breeders facilities, my advice is to clean yourself and everything you brought from there before getting in contact with the snakes, shoes included. Some people even have some shoes just for the snake room.
I wouldn't necessarily consider this a bad thing, you asked him about an issue he was not familiar with or hasn't dealed with it in a long time, so he did some research to help inform his opinion on the issue instead of just telling you to not worry about it or spreading some misinformation. If anything I think it shows some professionalism. Was this vet a specialized exotics/reptiles vet or a regular dog/cat vet?