I'm sorry, but that is Internet forum nonsense. A well-designed digital volume control is absolutely harmless in the real world. One might criticise the “law” of the control but the same may be said whether analog or digital. Likewise, some insist on a rotating knob rather than up/down buttons but that too is a personal preference.For example, if analog volume is available it should be used
The important point is that, in the context of a domestic DAC at an attractive price, the digital approach to a volume control engine is to be preferred.