Bird,
I agree. I doubt if many have seen a true audiologist with a masters degree or higher plus the technical certifications to fit hearing aids.
Audiologist Definition
They used to warn that a person with suspected hearing loss or tinnitus see a medical doctor first, Eye, Ears, Nose and throat,
to be sure it wasn't just wax build up or some more serious medical problem. I think most companies that sell hearing aids, in most states, require you to sign a waiver, if you have not done so before getting fitted with aids, to protect them against
possible lawsuits.
The training, experience, and desire to do the best job possible for the customer is the most important, as it is in any technical job.