Because it gives you a "large sound picture". If there's anything I've ever wanted in my pictures, it's for them to be large sound.

What's more, these ethernet cables work better passing data in one direction than the other. Here's me using ordinary, non-directional cables, like a sucker :(

Because will pay it. Some people think cabling, storage media etc. makes a difference in audio quality even when it is digital data.

Naturally this has no basis in any reality, but that doesn't prevent anyone from believing it.