Because traditionally, 3rd party games don't sell well on the Wii/Wii U system. Nintendo is a great company, and it makes great games and I love them. But their system is mainly tailored for their first party games. I am not saying the Wii U isn't capable of handling Destiny, because it is, its just not a good financial investment for Bungie to port the game to the Wii U. The costs outweigh the risks of it being successful on the console. (Opinion) To me, most people usually have a Wii/Wii U in conjunction with another system (Xbox or Playstation usually) if they are wanting to play the Nintendo first party games. Especially if they label themselves as a hardcore gamer. Its all about identity. Most players who identify themselves as a player who wants to play Destiny, also identify themselves as a hardcore gamer. Hardcore gamers identify themselves with a "hardcore system" which unfortunately the Wii/Wii U has not had that identity. The Wii/Wii U has an identity as a casual player system. This brings us back to the risk being too great for Bungie to port the game to Wii U. Hope this is informative enough for you and that you're not going to ignore me because I provided a thought-out response and that this doesn't label me as "stupid"