The idea of a 'cleaner' signal is entrenched in audiophile culture. Fundamentally people should do what they enjoy including chasing inaudible distortion measurements in electronic equipment. Just if it's not perceivable is it more rational than fussing about cable lifters? We're talking about things which people enjoy doing just they have no influence on the sound.
But they do have an influence on our perception of the sound. Unless we do something definitively bad in system setup or component quality or mismatch, it's almost as if the damned sound waves themselves don't matter.
If you've learned that H2/H3 have an influence on the sound, and you believe that the components you see in front of you produce sufficient H2/H3, you'll probably hear the result no matter if it's the lowest distortion system on the planet in practice.
Subjectivism is key in audio, we all have it. There's nothing wrong with it as long as we understand it for what it is, and don't start translating it into magic, pseudoscience or religion. The problem is we've been doing just that for the last forty years or so, whether it's "high SINAD sounds better", "more H2 sounds better", or the extremes of believing in ultra expensive "audio" fuses and such. Objectivism is really a shield against the nonsense, and not that much more.
This being a forum that has some kind of relationship to "science", I'll agree that we do have a thing about the sound waves, mainly because we can understand them a lot more easily than what is
between our ears.