Actually the PC market in Japan is... Not that great. Steam is just an afterthought for example, and the market is mostly filled with third rate visual novels and bad RPGs...
Mobile on the other hand is BOOMING and where the money is, the main reason why ninty is branching out here. Fire emblem and animal crossing is making a killing on mobile while being an ad for both franchises.
The switch only needs time; launch aligned it's matching the 3ds, and considering the 3ds slashed prices by 40 percent to meet that... And we know how much of a thing the 3ds was.