For holding it better? dont seem so wise why...
But I have a guess
Is on the name: switch. Or you play on TV or you play as handheld, you switch between one and other. Is the end of 2 screen concept. So, you cannot have 2 screens at once. As soon as you take the tablet off the dock, the TV signal stops and the only screen displaying is the tablet. When on TV, neither even see the tablet to not confuse people: "and that second screen, dont turn on?" no, only if you Switch.
It would avoid all the wii U concept that went wrong on wii U: "why only a few games use 2 screens?" and the confusion of having to look at 2 screens. But keep the right concept on wii U gamepad: off-screen play.








