How come people say that heavy metal is popular in Scandinavia, when its only a fringe of them that actually enjoy it?

the reality is that heavy metal is a fringe genre of music anywhere in the world, you will find a heavy metal subculture in many parts of the world and it fringe because its a music style that isn't and doesn't try to generate a pop or mainstream audience
Update: your average younger generation scandinavian person listens to the same mainstream stuff that many younger Americans listen to
Update 2: how do I know this. at my university, a lot of Swedish and danish exchange students that I met have no interest or even know much about metal or the metal music in their own countries
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