Actually, what the OP has said is quite true. I ran a High End audio business in the UK for 10 years, and sold manufacturer names such as Chord Electronics, Wilson Benesch, Martin Logan to mention a few. However my business eventually went in the direction of Multi-room audio and smart home technology, as high end audio was on the decline. I don't now anything about Mac, but specialised in a product called Netstreams, and although expensive; it basically stransfered audio around the home bit for bit with no loss of audio. And although analytically there may be a difference, there certainly wasn't any audiably. This kit also transfered audio via cat 5 and Cat 6 with no loss. Each piece of audio equipment had an IP address and was completely digital all the way up to the speaker drive units, unlike a conventional audio system with is analogue once the signal leaves the amp.
This kit would set you back around 4K per room, and the last time i used it was 4 years ago and the prices have dropped considerably.
Some of my customers spent 11,000 pounds per metre on speaker cables purely because they felt they had to. One of my customers spent over 100k on a system. It sounded great, but it sounded no better than my system which at the time cost me 10k at trade value, which i eventually changed to a digital multi-room system by Netsreams. The Netsreams sounded great wherever you went, and not just while sitting infront of a pair of high end speaker to obtain the best sound.