Well...because many of us don't give a single fuck about mobile gaming. The real question is why do so many seem to believe they can deflect console expectations, criticisms and disappointments with mobile stats, as if mobile and consoles are the same thing, bought by the same audiences for the same purpose.
I'm sure this won't surprise you, but many of us are grown ass adults that drive to work and don't have enough interest (or opportunity) to game while mobile anymore. We work at work and game at home where we have full access to a TV/monitor which can give us a superior experience to the often hand-cramping, poor resolution experience that typifies mobile gaming (at least on Nintendo and Sony handhelds). Mobile was good shit K-12 and through part of college, but that was the end of that for me. Maybe if I lived in a subway city, I'd still have use for mobile gaming, but I don't.
So yea, for those of us who only play at home on a proper console, Nintendo hasn't offered a platform with good 3rd party support since the SNES. It is what it is. No need to attempt to spin that reality; I've been playing on Nintendo platforms longer than half this forum has been alive. I know what time it is.