"and it's also clear they seriously doubt the sales of their titles on the platform"
This is also because they have it wrong about what sells their games. So when some make Wii games they go for the graphics about things like replay value and multiplayer. They seriously don't get that those sell games more, so when the games don't sell, they just assume it was the Wii audience.
In short, they are the reasons their titles don't sell, and they just don't get why.
A flashy-first game is awesome when it comes out. A great-first game is awesome forever.
Plus, just for the hell of it: Kelly Brook at the 2008 BAFTAs