Well, I’m happy you’ve been to some great veterinarians! I just say this because I know the profession well, as I am one. It sounds like you’ve had a few that shouldn’t have seen your tortoise and that is unethical and embarrassing. I do think that 99% would be honest and upfront with you.
Give Veterinarians a break here. Ninety nine percent will offer referral if they are not proficient in reptile medicine or at least let you know that they are willing to try to help if you are unable to use a veterinarian that is. Ask!