The main reason is that many, many years ago the fight over MorphOS vs AmigaOS and AmigaOne vs Pegasos was faught out here. The vocal battle went very high after which AmigaWorld.net was created and a seperate site for MorphOS.
Then the Amiga community split.
In the end the discussion was pretty pointless because ALL AmigaOne and ALL Pegasos were having hardware problems. Also the discussion about both OS was pretty pointless. So basically a lot of people waisted their time argueing about untrue facts.
The grim end result was that the Amiga community deminished in numbers by petty behaviour from both users and developers.