As Hans has pointed out and many others with ehternet it boils down to Filters. Also is is not just 1's, and 0's with audio. If people want to spend their money on cables, switches and the like, let them, who are you to tell them otherwise.
Caped Crusaders?
Read up and listen, you decide.
https://youtu.be/ZCFvIzzMqfk?si=xb5AOj70CGjfxCzd
https://parttimeaudiophile.com/2023/03/10/silent-angel-bonn-n8-pro-network-switch-review/
https://darko.audio/2023/10/podcast-10-hi-fi-myths-busted-w-peter-comeau/
3. Digital is just ones and zeroes and is impervious to interference