Paul, yep more clear, thanks. I also almost agree with you. The "almost" is because while I think for a good grounding in self defence the combative issues you mentioned should be in your training, I don't believe even kata-only training is a total waste of time with regards how you would react in a "real" (hate that term) situation.
Even with cooporative dancing ukes, the fact that you are used to working with both some form of attack and moving with the emphasis on placing your partner in peril will be of some use in the hypothetical real thing.
I agree, using only kata training is not an efficient method of training for combat, but I don't think it is as divorced as you're implying (or at least shouldn't be). The area I feel it's more lacking is that it doesn't help with the mindset you need, rather than the movements practiced.