Ok, so now we've gone full circle. Originally you said the Wii U isn't port-ready even though it's already getting ports from Wii U.
No, I never said the Wii U isn't port-ready. The Switch is not Wii U port ready. There is certainly some way to make Wii U games work on the Switch, but I don't think it will be the method you described, and I don't think it will be simple. It will require reworking of the games in order to either remove or integrate the dual-screen mechanics so that it functions for a single screen.
The Switch is
MORE Wii port ready because it has the remote and nunchuk hardware available in the system, and the games will likely not differ in performance from translating motion controls to those devices. Does that mean a port will be easy? Not necessarily. However, important Wii U ports will differ in performance from their originals, no matter how much you say "the second screen stuff was minimal at best". Xenoblade Chronicles X had an off-TV play mode, fair enough. Mario Maker was primarily played on the Gamepad because of touch controls. Splatoon had a map on the second screen that was constantly updating while you were in-match and allowed interaction. You selected and painted cards on the second screen, not the first, in Color Splash. Those elements will be removed in their Switch iterations, and while that might be "easy" to get rid of, it will still need to be gotten rid of.
I understand your definition of "port-ready"- the game will make its way to Switch because it's finished, the architecture will likely support it, and it will take fewer resources to do so than actually developing a new game. Yes. This makes sense. Just as you don't understand what I meant when I disagreed. I hope we have both clarified our points of view, and although our definitions are different, I don't think that either of them are particularly valid, because you think a port would be easy if Nintendo used a mobile app to circumvent the issues of taking away the Gamepad's second screen interaction and functionality, while I think of a port as "a 1-1 transfer of mechanics and controls to a new system."