It's not "doom mongering", it's simply the appropriate realization that if the Wii U continues selling like this, nobody will support it and Nintendo will have to wake up. You're shielding yourself behind the idea of profit as if that really changes anything in my scenario. Gamecube was profitable too, but the reason it was a great system is because Nintendo developed games as if they were behind and they came up with some of their best ideas that weren't also tied to some gimmick, and the lasting impact was a generation that was easily one of Nintendo's best. Yet few people would call the Gamecube a successful system in terms of its performance; it's part of what prompted Nintendo to change course.
They sold a trillion units of Wii, and that's "successful", and as far as I'm concerned it was completely the wrong direction I want out of Nintendo as a gamer and it had the least games of any successful console that were interesting. I only care about games, I don't give half a shit about sales, so you won't find me caring whether or not they are not in the red - you'll only find me caring what the poor performance will do for Nintendo as a company who develops games. And for me, when Nintendo is behind is when they do their best work. That is why I hope that occurs, because I feel like Nintendo will begin to focus on the people who put them their in the first place.