The exception is of course, "critics" who actually have never studied the form they criticize nor the actual art of criticism. Then I would agree that the "expert" label is, as you said, BS. I would also tend to refer to a critic with actual film experience as far more of an expert than one who just studied it, which is part of the reason why I do give Ebert a lot of weight, he did make a film, it was horrible, but he did it.