I'm not a huge cable enthusiast. But I will say that when I listened to the black dragon and silver dragon cables back to back, there was an obvious difference. Enough that it wasn't just my brain looking for change.
So I believe saying that cables do nothing is a pretty uneducated opinion. Now, are the cables worth changing? Not for me. and the asking prices of aftermarket cables are laughable.
Find a DIY'er you trust, and have them make you a cable for a fair price if you want to switch things up.