My interpretation of Mr. Singer's message is the following. It is that you need to experiment to find the cables having the right synergy with your system.
He is saying if you only experiment with very expensive cables, you will find an expensive cable with the right synergy.
He is also saying if you experiment with less expensive cables, you will just as likely find an inexpensive cable with the right synergy.
He is saying that the less expensive cables with the correct synergy will likely sound just as good as the more expensive cables with the right synergy.
Manufacturers and dealers of uber expensive cables love you.
By inexpensive cable, I am not referring to zip cable.