All you have proven is that if you want lots of choices on how to play, then you need to pay more money...what is so novel about that?
if you want to pay for four people to play your wii then yes you do need to buy 3 more wii motes.
if you want to pay for four people to play your wii for a game that uses numchucks you have to buy 3 more. (not many of those anyways)
if you want to buy: 3 wheels, 3 dance pads, 4 classic controllers, 4 gamecube controllers... and so on...
yes it costs more if you want more... want more = pay more ...suprising...
last time i checked, it was nice to have options...