Personally I always saw Duchampis and Dada in general as a case of what we would now call trolling. An expression of intenral disgruntlement in and by the art community of the time and taking the piss a bit more literally than usual. There were already several cases of feigned identity of painters to gain more fame already and it seemed to be a sincere expression of frustration by mockery. Which exasperated them further by being taken seriously.

Ironically the "missing of the point" seems to have become a point in itself even without the historic context. Weird accidental statements by society in its reaction like ignoring the virtuoso playing the Strativius in the subway station because they don't recognize the quality without the trappings. A mere portrayal would be a ham handed allegory but if it really happens a lesson can be learned instead of an expression of another's opinion.