Will people travel first or business in the future in order to cover these high costs that flag carriers have when flying from their overpriced major airports? I don`t think so.
I think you are just making that up to fit the narrative. If you think people are going to give up flying first and business with a major and settle for Norwegian you are living in a dreamworld. Expect economy airfares to soar, those who use business and first will keep flying business and first.