The Word "Pretentious"

When it comes to film/music/theatre/literature critique, I am a big believer that one's criticisms need to have an element of falsifisity. Instead of just saying, "The vision of this film was totally wack! Don't see it!" write something like, "This film's color pallet is very limited, making it seem monotonous. The camera operators failed to carefully dipect the action, making it seem too much like The Blair Witch Project when all the scene needed was a steady-cam shot." My point here is that if one is going to criticize, one ought to give support for their arguments.
     The word "pretentious" is used often to criticize art, but is almost completely baseless, and does not fit well into an argument about a work's quality. Any sort of work that aspires to something grand in vision will almost always be attacked as pretentious, but that tells me nothing about the actual work itself. Music critics ruteenly call indie music bands like Radiohead, Arcade Fire, Of Montreal etc. pretentious, but these same critics fail to give a counter-example of un-pretentious music. Is Johnny Cash un-pretentious? His six-part American album series, with two instalments coming out after his death, seem pretty grand in vision, that might very well be pretentious. U2 has recieved the pretentious lable, but I suspect that comes more as a criticism of Bono's activism. Once again, that tells me nothing about the music; music should be judged by the quality of the music, not by the identity and actions of the band.
     This is the same story with film and literature. Every indie filmmaker with a vision to make something good must deal with the baseless and meaningless criticism of preteniousness. What about Spielberg's ET? Wasn't that pretentious to make a kids' movie about an Alien that symbolizes Jesus? Wasn't Orson Welles pretentious to make such a long, epic movie like Citizen Kane when he was 25? No, but Quentin Tarentino was pretentious making a self-referential genre film like Pulp Fiction?
     I request everybody to stop using the "P" word and instead base their critique on objective observations.