Tell me this. How many people drive cars in the United States? (100 million? 150 million?)
How many of them would you trust would have the expertise to drive a NASCAR vehicle at about 200 mph in a NASCAR race?
The subset of experts who understand what they're doing is considerably smaller than the set of amateurs who don't -- even if the basic skills are similar.
"The subset of experts who understand what they're doing is considerably smaller than the set of amateurs who don't -- even if the basic skills are similar. "
An amateur is someone who isn't being paid for his work. Pick up a history book and see how many technical and scientific advances have been made by amateurs -- people who fund their own research. Einstein did some of his best work as an amateur when he was a patent clerk.
But you raise a good question -- who should we trust? Honesty is more of an issue than competence. I would trust the man who is not being paid, he has nothing to lose by telling the truth and nothing to gain by distorting the truth to please his politically motivated patrons.