It does make sense. I certainly care about the quality of the screen I'm looking at.I guess for me, part of the problem is that I don't find the Gamepad to be cool? I mean that relatively speaking, my plasma TV is far superior to the Gamepad. The reason I bought the TV is to display my games among other things with the best quality for my money. Forcing me to look at the Gamepad is forcing me to look at something far lesser. That's why I think hooking up the WiiU to a cheap 15" LCD I have lying about will help with that part of my psychology. It probably makes no sense to other people.
But at the same time, after a certain point, I can forget about screen quality, resolution, and even framerate to enjoy something if it's fun. All of that stuff, while nice, sort of melts away when the experience is compelling enough.