You are forced to buy Wii Sports with the Wii system because there is no other bundle.
Wii + Wii Sports is officialy the only option(well at least in Europe)
If you could choose only the Wii without Wii Sports, I would have said okay but I can't accept this.
I am a Wii owner too(and I love it) but I hate that crap like Wii sports, play,fit, music...
It could be the most owned game but not the best selling. It is not sold separately dear friends!!