@jssmith If you understand that then you should also understand that the product of noise and jitter is distortion. And the levels of distortion that are audible can be measured and have been known for many decades. And almost all digital devices are below those distortion levels. No one disputes that humans can't hear 50kHz. Why do people dispute that they can hear inaudible distortion?
Possibly correct when it comes to the effects of RFI/EMI, not sure. Not correct in the case of jitter. Jitter is measurable and the effect is measurable, but jitter is not about additional noise, audible or not, but rather distortion of the sound itself by smearing the timing. If measurements are your thing, we can look to the ever controversial ASR team and their review of the Allo DigiOne that I am using:
Amir gives this device a high rating based on jitter measurements. Jitter, or lack thereof, is audible, if you have the system and the ears to hear it.