You could try renting the game off of one of those online rental places if you have a fear of leaving your house.
But I mean, honestly, how messed up would the controls be, considering that they've been working on the game for, like, forever. The game was supposed to come out last year. Do you really think that in a whole year they haven't spent more than half an hour deciding what kind of Wii controls to implement?
This is The Legend of Zelda. THE Legend of ZELDA. A franchise that tops many people's lists as the best ever. Do you really think that Nintendo's going to screw up one of the most hyped-up games in the series with unplayable controls? Honestly, Nintendo's not that dumb, and they're not going to change it back if a few people are hesitant that they might actually have to move their arm a little bit to knock a Moblin down.
As said before, you could rent the game first, or just get the GameCube version, if you really have serious issues with "arm movement".