I'll do the apologist bit here for a moment.
Professional reviewers are paid to provide their critical, informed opinion. That often comes from having studied media formally in a college setting, having long exposure to and interaction with the film industry, and deep knowledge of how films work, the history of films, the production process, directors' histories and styles, and on and on. The summary dismissal of professionals who actually know what they're talking about doesn't add up in any logical sense. It's still an opinion, but it's a heck of a lot more of an informed opinion that most others can muster.