How would it be a dis-service? The touch can function without the motion controls, having a game that doesn't use them would in no way shape or form hurt the game or the developers, people would simply play it as thought it were a normal controller. Nothing would change.
Name me a single peripheral outside the rumble pak for any major console or system that came out post-release and became a mainstay that every-game/dev built toward expecting people to use it?
Meanwhile I'll list those that failed:
32x
Dreamcast VMU
N64 expansion pack
Nintendo power glove
Nintnedo VRU