Presumably, Banksy knew well that the stunt would increase the value of the drawing. So on some level, non-naivety is likely no matter what.
That said, it's still a commentary on the "art world." The unidealistic ways & reasons art is bought and how the value of art works... contrast to the idealistic artist destroying his work rather than having it denigrated. It's also inevitably hypocritical because the artist is either benefiting from the whole hype and hokum or wishes to be.
My guess is that the last part is why this is such a common navel-gazing motif in art. The heart at odds with itself. Idealists always struggle with all the hypocrisy, especially their own. Poor things.
That said, it's still a commentary on the "art world." The unidealistic ways & reasons art is bought and how the value of art works... contrast to the idealistic artist destroying his work rather than having it denigrated. It's also inevitably hypocritical because the artist is either benefiting from the whole hype and hokum or wishes to be.
My guess is that the last part is why this is such a common navel-gazing motif in art. The heart at odds with itself. Idealists always struggle with all the hypocrisy, especially their own. Poor things.