Do you have to have credentials for your theory to be right?
In addition, what kind of credentials would make someone an 'expert' on the subject?
I'm not of the opinion that a wall full of diplomas is necessarily an indication of wisdom (nor am I saying it isn't - like everything else, it depends). The old saw, "a Ph.D is the result of learning more and more about less and less", is often a truism. I know of a course-for-credit in "wine-tasting". I am familiar with a philosophy prof who taught a course in "The Philosophy of Rock-And-Roll". Back in the day, when I was asked about my own major, I would respond, "I'm majoring in female anatomy, with a minor in discotechnology". Nowadays, you can actually graduate with degrees for it.
Giorgio Tsoukalos has a BA in "communication", and I believe that makes him an expert at what he does. He is a self-promoter and he has found his niche. Prior to making it big in the ancient alien business, he was a professional bodybuilding promoter. I would have guessed the WWF, but close enough.
He is part owner and major contributor of a magazine, and is "available for interviews, lectures, TV appearances or any other promotional work . . . " Giorgio recognizes that this is his moment, and he's going to milk it for all it's worth. His success is evidenced by the fact that we are discussing his show. You go, Giorgio. Play that guitar on the MTV.
Sadly, in a world of "reality" TV programming, it really doesn't take much to become an expert. The smaller the pond, the larger the fish can grow, especially if the audience is uneducated. The solution, if indeed a solution is called for, is fairly simple: don't feed the fish.
Caveat emptor.
