Wasn't the point that if you have a system capable of outputting a 192kHz analog signal on the DAC, essentially hitting your speakers with 96kHz audio, any non-linearity starting at the DAC and beyond could cause distortion in the actually audible range?

And if you do any downsampling, or any low pass filtering in general, then having 192kHz sampling is even more useless, in addition to only having the "benefit" of adding a frequency band to the spectrum that's completely inaudible anyway.