That statement is the reason. If Ubuntu were called "Ubuntu GNU/Linux", we'd still have a bit of an awkward situation, because there's no Linux involved; it'd

That statement is the reason. If Ubuntu were called "Ubuntu GNU/Linux", we'd still have a bit of an awkward situation, because there's no Linux involved; it'd be "Ubuntu GNU/kWindows", going by the stated naming convention. So it's not that "Ubuntu" is the problem, per se; it's the lack of mention of GNU. I suppose that's worth clarification in the article.