Canonical's stand from the very beginning has been to reduce user's confusion at having too many option by providing sane defaults. Yes, even if those sane defaults are chosen by insane people ;-)
I found it somewhat contradictory they funded Kubuntu to begin with, and tought it'd be obvious that in the end they would choose one of the environments, leaving the other to be community maintained (as countless others).
And yes, I was right all along! ☺