Criticism should be done by critics, and a critic should...

Criticism should be done by critics, and a critic should have some training and some love of the medium he is discussing. But these days, gossip-columnist training seems to be enough qualification. I suppose an ability to stand on your feet through interminable cocktail parties and swig interminable gins in between devouring masses of fried prawns may just possibly help you to understand and appreciate what a director is getting at, but for the life of me I can't see how.