[Link: audiotweaks.com], this might explain the why they thought it would be a good idea.
I wired a home theater many years ago with "one wire" solution, which I am sure was from MIT wire, but I can't find anything on their web site, I also was shown, about a year ago, Synergistic research "AV Matrix" which was a coax wire you were supposed to use for everything. I don't remember if they showed a Speaker adapter.
I do know that the MIT wire system did have coax to speaker banana's or spades.

Good luck