Distrust is not quite the right word. Understanding of limitations, maybe.
It makes sense that there will be differences in different types of circuits, though certainly when specific claims are made, I like to see tests where possible. I am skeptical of many of the claims, and won't be buying a $1000 dollar version of the same circuit that can be built for $200 just because it has audiophile caps and resistors in it. Not without a DBT to show there is an audible difference.
Headphones I listen to, I also review response curves and square wave data (and impedance, etc.). Again, there are good reasons for differences in sound.
Ultimately, for me, it comes down to the nature of the claim and expectation. If someone is telling me that something like a cable is making a difference in a sound, when there is not much theory or rationale (or evidence) for that to actually be the case, I need to see that evidence. Likewise, I don't need someone to back up a statement that they crossed the street. But if they tell me that they flew, I am skeptical. It's a balance.
But there is my piece. I've stated my opinion on the OP's original request as well as the one fact: that there has been no repeatable, falsifiable evidence to suggest that any properly made USB or audio cable will affect the sound. Like any opinion, they are free to take it or leave it - but nobody is entitled to their own facts. Anything more on this, we can take to the Sound Science subforum if you want to.