The exact same reason keyboard and mouse are better. The transitional times from a point A to a point B on the screen using analogue sticks is set, no matter how good you are. With the other control methods said time approaches zero, and is solely dependent on the skill of the player.
Example of just how shitty and bad analog sticks are for FPS games: aim-assist., I do laugh how analog FPS players think they are "hardcore" though.
Tag(thx fkusumot) - "Yet again I completely fail to see your point..."
HD vs Wii, PC vs HD: http://www.vgchartz.com/forum/thread.php?id=93374
Why Regenerating Health is a crap game mechanic: http://gamrconnect.vgchartz.com/post.php?id=3986420
gamrReview's broken review scores: http://gamrconnect.vgchartz.com/post.php?id=4170835
