"In the final analysis it doesn't matter in a large number of cases, because the treatments are basically the same regardless of what you choose to call bowel inflammation caused by autoimmune disorder."
Total colectomy is not prescribed for treatment of Crohn's because the disease will eventually manifest somewhere else in the digestive tract. With ulcerative colitis, the only cure is colectomy and that is why the Doctor's diagnosis is critical. If my Dr. had told me he wasn't positive it was UC, I would not have had the procedure and I would still have a colon (and the doc would have made a few thousand less that year).
As I recall, your theory is that you would have needed at least a resection anyway because your colon was dissolving. If that's true you are in a distinct minority.