This has turned into a very stupid argument, and yet I can't stay away.
Service at a restaurant is catered towards the customers, many of which are not going to have experience in the restaurant field. Service is meant to appeal to them to keep them as customers, without the need for them to have a background in restauranteering.
In the same way, (most) movies are created with an audience in mind, and that audience isn't other movie creators. This is why a movie critic doesn't have to be experienced in -making- movies (though there is no argument that this experience can add perspective) because they are entering into the experience as the audience, and their job is to translate their opinion to other laypersons in that same audience pool.
If you, as a film director, create a movie that only other movie creators are going to enjoy, you shouldn't be upset when critics reporting to the general public give it a pass.