Yeah, the quote is bang on, not sure if you agree with it or what. The best a cable can do is do no harm to the signal.
But in this “comparison” between cables you mention there are so many missing pieces to the story. And it looks like you left them out on purpose, so I’ll just say good for you.
I’ve said it before and I’ll say it again. Start a cable thread on any brand cable, and in short order you have haters with bizarre stories.
And the inevitable mistical experiences with some other brand that has them doing back flips, it amazes me how every single brand out there has amazing improvements AND awful results. How can it be anything else than either equipment mismatches or user error or hearing tastes that are bizarre?