No, I didn't miss it.
I have the same experience in my field where client in this case keeps telling me how to do my job (then why did he hire ME?) I also don't use the word competition in the same you think I did. It's a competition to take the photograph, which is interference. (not the competition to get the business - which is what you are referring to)
Amateurs do get great shots sometimes. Pros do poorly sometimes. You have to recognize, the term "Pro" is defined very loosely often. (You addressed a while back yourself)
Sadly, paying public know very little about how to be selective. They want a CD full of images not two dozen great shots.
Another point I was raising is, this interference is not limited to photography. It's in every field in different but similar shape and form.