I don’t think flaming you is appropriate.
‘However, like scientist; observe.
Try a cheap cable like Blue Jeans, a well reviewed $500 cable and a $1,000 one. And despite all the logic they are likely to sound sound very significantly better (depending on the quality of your system). This is the acid test. Then you start working on hypothesis as to why this might be true.
Starting from the logic that it can’t make a difference is a great way to get it all wrong. For the last fifty years of me trying that (to logic it out) and being proven wrong by observation every time has cured me of believing in that approach. Also, I was a scientist for over a decade.