Who cares if they’re quiet? I wouldn’t mind a washing machine level of noise if the darn thing just worked. We bought a Bosch that is incredibly quiet, but doesn’t clean worth a damn. Nor does it dry the dishes.
And it uses asphalt as the sound deadener, which outgasses chemicals like crazy. They like to call it “bitumen” in the hope that people don’t know what it means, but its still asphalt. Smells like a road that’s just been repaired.