Nice rant! (and I mean that sincerely) You have stated the problem very well. This issue goes beyond what the rikishi did or didn't do. It's about honor, dignity, and respect. I trained in martial arts for over 20 years and had my own dojo. I saw this problem with some aspiring students. There is more to the "art" than the physical side. Rules are rules for a reason, and not always for the most obvious reason. They, too, are a part of training. Again, I don't mean just the physical aspect of training.
When I first began watching sumo, I liked Roho but over the past several basho, I was disappointed in his performance, not just physically, but in the way he always seemed angry or sullen or whatever term fits best. I think his physical sumo suffered in part, because he had not the emotional or spiritual balance to sumo.
cj