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Similarly (and more to the point of integral serialism having "nothing left to say" after a certain point), you can look at the highly varied output of Stockhausen across works like Stimmung, Mantra, Sirius, the Licht cycle, and certain pieces from the Klang cycle and observe ways in which compositional techniques typically associated with 12-tone or serial composition—but also found in certain works of Bach—were re-purposed to explore different (non-serialized) musical materials. (There are also plenty of singable tunes in Sirius and Licht, if this is any metric to go by.)

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Musical kitsch aside, expression and ideology are more often than not two sides of the same coin—regardless of the musical aesthetic.