those that can do, page-5

ClarkK, "Political commentators don't have to be politician, sports commentators don't have to be Olympic athletes and crime reportes dont't have to be drug traffickers or detectives."

Might well be true, unless actually doing it give you a better insight or understanding of the subject. But I follow your thought.

I guess that's why people seem to be coining the term "Expert Commentators" for those people who have done it.