It absolutely matters, they have admitted on multiple occasions that the reason the Wii U's lineup suffered as it did (both in terms of release cadence, and also in terms of the kinds of games released) was because Nintendo had not accounted for how difficult HD development would be, and that, on top of 3DS development finally bringing handheld development to a more resource intensive place as well, broke the camel's back.
Without those problems, it would still be a bad product, but it would be a bad product with some great games released at a more steady pace that would have salvaged it at least to Gamecube levels if nothing more.