In fact, you are right, most Linux distributions are bloated, so are the BSDs. But linux users have completly different motivs for using their OSs than amigans. They look for freedom of the code, for usability and for cheap software that works.
Im sure lot's of them would change for a light weight, quick response system with the feel that you are in control if they could without having to back down from their favourite motivs of above. But now you have to pay for an amiga system and you don't get all that functionality you do with a bloated Unix system, and once something doesn't work you can't fix it but have to hope for someone else to do it so that you can buy the new version.
That leaves only us that really really love the amigas advantages and are willing to suffer the consequences of our choise to stick around.
/Roos