When i played Trauma Center Co-Op on Wii with my mother (complete non-gamer) once, she was already slightly confused about the maybe three Buttons that you have to use for that game...so you could argue that, at least for those people, Move is already too complex.
Kinect of course has no problems with "The WHAT BUTTON? Where is that? What does the game want from me?", but on the other Hand without Buttons, and, as far as i see it, without recognition of more...delicate movements (like fingers)...anyone noticed how at E3, everything on Kinect was controlled by hovering above menu points for a few seconds? Apperantly, you can't really "push" anything with Kinect. As such, Games for Kinect have to be either very simple OR have to still use a controller OR require specific movement patterns...so in the end it might be even worse with Kinect games that are tiring AND/OR complex.
As far as i see it, a 16-or-whatever Button Controller may actually less complex to handle for anyone once they get the hang of it.