case + point: rabbids 2 is wii only
everyone likes the wii and the rabbids
ubisoft likes money
the end

The GBA and DS versions were actual platformers, anyway. What more can you ask of them, "I'd like you to cut into your only source of income to spend it on a less profitable game so I can get my fix"? Besides, this happened before, 9 years ago with a little game called Mario Party and it's still going strong.