2 million units is not a "hit console" yet, the sales rate simply paints a positive forecast for the system if it continues in this manner. For third parties wary of Nintendo systems and the perceived limited sales potential that they represent to any games not published by Nintendo, it makes far more financial sense to wait until the Switch has a much larger install base before putting high cost projects on it. People need to stop acting like the Switch has outsold the PS4 or something. It's still very much in early days and nobody knows if it will actually sell to the mainstream market once it's done selling to the 8-10 million Nintendo fans who buy anything the company puts out automatically.
As long as this doesn't change to 60 million Nintendo fans because of the 3DS the bolded statement won't even matter next year.