I think I may have heard the greatest/best myth of all time today. Was discussing something with an "expert" and they said - that the person who had done the work was a "professional" so it had to be right. I - on the other hand - was not !
I am merely a pleb who uses logic when trying to work something out. When you use this with an "expert" they tend to brush you aside as a novice who isn't really qualified to talk on the subject. Even when the logic suggests the opposite.
This can be seen with Foxtel "experts" who are really just people who attach a box to your TV - to internet "experts" who think they are telecommunication professionals. I had one Foxtel "expert" replace my box 4 times before they'd look at the connection to see if it "could" be something else (after all - were all the boxes faulty ?). Yes - it was the connection.
I had another "expert" telling me my driveway had to have a tunnel dug under it and a new conduit installed to supply a cable to the house. I pointed out we already had a plastic conduit under the drive that could be used. After a stand-off where the "expert" told me how he knew better than me and how it wouldn't work - he stormed off. His boss came the next day and started the same story. I pointed to the already installed conduit and merely showed him how - by logic - it could be done. As if by magic - he agreed.
So - the moral of the story - don't assume these so called "experts" are really experts. They merely know how to lay a line or attach some wires. Logic leaves them floundering. They are not professionals in the field - they just know a basic part of the job.