> No more absurd than the notion that a mere sequence of sounds could convey any other meaning or elicit any other response.

Disagree. The fact that voluntary communication works is somewhat miraculous, sure. But the idea that a reader could be made to experience something unpleasant against their will by mere words is far stranger. Obviously unpleasant meanings can be conveyed through words, but the idea that the words themselves can be inherently unpleasant feels like some kind of moral panic/social contagion (like if there was a satanic panic centered on the "brown note") rather than a real thing.