I tend to agree that cables are variable, just like all audio components. You can have the best speakers in the world but if the room isn’t a good match (maybe too big, too small, whatever) it won’t make a great combination. Same with amplifiers which much match the speakers or you won’t have a good time.
A cable might be far better than the rest in one system, but not necessarily the best match in every single system. That's part of the reason why it can be hard to gain consensus on audio gear. Everyone hears things differently and has their own priorities which makes things more complex, but also they may actually be hearing different results based on system matching. So it's tough to say.