Reason #1 If you think you are more knowledgeable about film or somehow your judgment is as valid as those with doctorates in art history, literature, or film studies then your hubris is even greater than I imagined.
Of course they have an expert eye, have you ever read a proper review by a proper writer ?
We're not talking about garden-variety hacks who get paid to crank out a review for their local circuit rider. Have you even read so much as a sentence by David Denby, Pauline Kael, or Bazin? I'm guessing not since their work typically appeared in lefty rags like the Guardian that you shun.