As with the majority of other issues, this is a question relating to the artist's intentions. If serialism is used as an end to the composition (i.e. Schoenberg's later works), then I agree that most of what is expressed is just a desire to appear iconoclastic, comparable to bands like Nirvana and Slipknot.
On the other hand, serialism may be used as means to an end or as just one of many devices in something much more wholesome/ traditionalist (Alban Berg's neo-romantic Violin Concerto, Messiaen's Turangalila Symphony). Used like this, serialism is not a rigorous intellectual exercise only, but also a method for the composer to keep the audience entertained, their intellect alert at the same time.