A group can probably develop a consensus around certain criteria and principles that are applicable to judging film. The rub is the hierarchy of those criteria and principles, and then their application on a film-by-film basis.
Yes, the Van Gogh is likely "better" than a third grader's drawing. But is it better than Picasso's "Guernica"? Is Michelangelo's "David" better than Michelangelo's "Pieta"? And - at some base level - how much does it matter?
The emotional impact of a work of art, including film, on a personal level trumps nearly everything for me. I try to analyze why one movie hits me more than another, but that takes nothing away from the reality of the emotional reaction and attachment.
And, yes, I would consider "The Asphalt Jungle" to be "better" than "Jail Bait," but I'll take "Female Jungle" over both.