OK, I'll bite.
OK so you are saying to listen to the sound instead of the electrical parameters of the components...yes, that's a noble thing, actually enjoying the music. We all do that though.
Now, when you look at a loudspeaker, what is it? Simply an electcro-mechanical conversion process....it takes an electrical signal, and converts it to mehchanical motion. This mechanical motion produces your sound.
Therefore, if you can hear a cable, it means the cable itself posesses different electrical parameters. Thus you basically jsut said that the specs DO matter.
What you did mention of note though, was misleading specs, like the Westinghouse TV...that is the actual problem, however no manufacturer wants to be foreced to be 100% truthful, since it in essence catches many of them with their pants around their ankles.
Audio reproduction is pure science, namely acoustics, physics, and electronics. Pretty much fidelity is just that much more control of those pesky electrons