Ethernet Cables, do they make a difference?

I went to the doctor and told him I didn't feel good. He ran tests and said I was imagining it because he couldn't see anything in my test results that would explain how I felt. When I left the doctor, I still felt bad and he felt scientific. One of us was experiencing something while the other was busy explaining that the experience wasn't genuine. This illustrates the never-ending "I hear it--no you don't" back and forth on this site. Trotting out what degree we have in a specific discipline, or our technical credentials doesn't invalidate what a person says they sense or experience.
I understand the back and forth isn't going to end--but it can be done in a way that doesn't infer, imply, suggest or expressly say that whoever doesn't agree with the stated position, whichever one it is, must be intellectually inferior, dishonest or lack the acuity to share the experience.    
Peace
Al 

I seriously doubt you’re ever going to see audio over Ethernet in a residential application. That’s a technology well suited to driving massive line arrays at a rock concert or integrating audio into a studio IT infrastructure.

@astewart8944
Usually when somebody presents claims of symptoms that have no basis in reality they’re treated with psychiatric medications. Is that what we should do with people who hear Ethernet and HDMI cables? I'll remind you that there are people who swear they can hear the electricity in their wall outlets.