That's in the ideal situation but they need games that can sell reasonably right now rather than simply talent. They're software portfolio for their home consoles is practically deserted in comparison to a console with third party support which needs to change one way or another. Either by becoming entirely self sufficient, or regaining the support.
You can't afford to pick and choose with a console like the wii u.
What isn't so obvious is that they have absorbed a huge amount of talent from other large Japanese publishers. The problem is the dire state of the Japanese console industry and the seeming lack of interest in console development. Home consoles are almost entirely in the hands of western devs which Nintendo doesn't have much of a handle on.