and the two shall be as one
I've seen your question or assertion about two legs splitting the load before and hoped a mechanical engineer could weigh in. Where's Knotty or Rapt when needed??? (or others whose identities I don't know...)
The question / observation I have for said engineer is that you have two legs...up to the point where they join---top of the loop, over the webbing or whatever. What is the strain on that join point? The cord system is only as strong as the weakest point.