Because cold, hard data indicates it's not even selling close to the Gamecube right now.
220k for a 2nd November is pathetic, that's not even half of what the GameCube sold it's second November.
And you're right they did start marketing and from August onwards have had a decent release schedule, not to mention a price cut and several new bundles.
That hurts your point, it doesn't help it.
I used to think 30 mill was a possibility, but now I think that could be incredibly generous. The system is not responding well to price cuts + a better library + better marketing, which indicates a fundamental lack of interest from the consumer. It's just a system that no one but a faction of Nintendo fans is really all that interested in.