>Figured that's the best most people can hope to see(...) so the pictures just aren't representative of what you are likely to see while in these countries
Its quite wrong to assume your three month experience is representative for what you would expect to see of northern lights in Iceland and Finland.
I don't think most people's holidays are going to be longer? Not sure what makes you say that. I understand one might get lucky or unlucky, are you saying my 3 months happened to be extremely unlucky and therefore it's "quite wrong" that this can be extrapolated to an average experience when visiting the countries?
Its quite wrong to assume your three month experience is representative for what you would expect to see of northern lights in Iceland and Finland.