Because Sonic Team has no clue as to what they're doing, so the Sonic fan base is ridiculously fragmented. The fans act as if the stories in Sonic games are important. And it's filled with yiffers. Just check out the Sega forums.
Here's a link: http://forums.sega.com/forumdisplay.php?42-Sonic-Games
"On my business card I am a corporate president. In my mind I am a game developer. But in my heart I am a gamer." - Satoru Iwata