NS competes with PS/Xbox the same way as wiiu did. Yes, they are all gaming consoles designed for gamers, but the library is very, very different. Smby who wants to buy a NS won't buy a PS instead or viceversa because the gaming library is different.
I will say even more, if NS would be a home console only, it would be Wiiu 2.0. Nintendo handhelds always had very good sales and the fact that NS is a portable console that can be played on a TV in a easy way helps it a lot (plus handheld ip like Pokemon, Animal Cossing will be great systemsellers).
Anyways, the sales are very good and it's nice to see that N franchises have such good sales.
Can't we just accept that a direct comparison is never fair?
More than this, NS launched on the same day WW, while Ps4 had different release dates for NA, EU and Jap, which makes these kind of comparisons even harder.