What they are trying to say is that a dac is not supposed to have a sound signature. Which makes sense. Also it is counterproductive to have a sound signature esp when it’s a blind buy.
But they tend to carry it a bit far since they are addressing the issues with audiophile community. It is odd that there is such a big and active resourceful community which is relatively inactive to blind tests. That should have been the mainstay if the idea is to find better equipment objectively. Since that Isn’t happening dacs being produced with sound signature is not surprising. There is money to be made.
atleast that’s how I understand the debate