Celebrities should not bellow opinions other than how to act or whatever.  They are not authorities on anything else, and I don't care if I agree with what they are saying or not -- they are given entirely too much credit and the press and everyone else should ignore them when they are out of their competence, just as we do with anyone else behaving like that.  Talent and intelligence, also, are only slightly related (you do have to have a few smarts to properly utilize your talent if you are talented).