I think that's what they're aiming to do, yeah. Port all the "good" stuff from a low install base platform to a high install base so more people can buy it.
That said, as to Tanooki's wording - I'm personally of the mindset that given the small Wii U library, it has a really high ratio of good games, personally. And one side-effect of these ports is that it seems to make the Wii U versions less desirable so I've picked up cheap copies of Tokyo Mirage Sessions, NSMBU/NSLU, Mario Kart 8, and so on when people have been upgrading to Switch ports.