This is very true. However it needs to be understood in context, as explained in this other thread: Digital volume control on Premier.
I freely admit that I have no background in electrical engineering or any other discipline that would qualify me to give an authoritative opinion on the subject, but take a look at this particular response: https://forum.msbtechnology.com/t/digital-volume-control-on-premier/900/18?u=bthartman.
I’m pretty agnostic about many of the “hot button” topics in audio forums (e.g., expensive cables, power conditioners, high resolution files vs “redbook”). My bottom line is if I’m curious whether something will make a difference I try it and decide whether it works for me. I determined that analog interconnects and speaker cables do make a difference - for me. And that expensive power cables don’t make a perceptible difference - for me. And in my case, with my Discrete going directly into my McIntosh MC462 I don’t hear a perceptible sq difference between 70 or so and somewhere in the 80’s for volume setting. But again, this is for me, in my system and my aging ears (with, alas, hearing aids). But YMMV.