I think in this case it makes more sense not to push motion controls this late in the console's life cycle. The audience that had Wii Remotes were early adopters they are a smaller percentage now, the rest are people who got the machine for Mario Kart, Smash, and Spaltoon, there is a good chance they don't have Wii remotes and this is Nintendo marketing the game to the largest audience possible instead of trying to sell people on remotes, which is what their goal was when it came to Wii but doesn't make sense now.