Should this be considered if we already have a high quality DAC?

Snarky post is my guess.  But I will bite:

No Ethernet Switch can make your couple of hundreds $ “DAC” sound like a SOTA DAC.

i denied this for a good while, but i now do believe that a better ethernet switch does matter over a bottom of barrel, cheapo, poorly designed one in preserving/enhancing sound quality of a digital feed

that said, whether one as expensive as the op is highlighting is necessary to reap the gains a better switch brings is another question altogether... just like saying better cables matter to a good sounding system, but you likely don't need to spend thousands to get better performance

As mentioned above, I wouldn't sweat the switch until you are streaming from a lossless service. Qobuz is my choice.