Most marketing instinct runs toward the rational. Sand off the rough edges. Optimize every feature. Make the product the cleanest version of its category. Sutherland's point is that this is how a brand becomes invisible. When everything works in straight lines and everything is proportionate, you blend into the average. The brands people remember keep a deliberate idiosyncrasy. Rolls-Royce was the last car to keep a pedal on the floor. Veuve Clicquot is the champagne known only as the one with the yellow label. The oddity is not a flaw. It is the memory hook.
He frames the target zone with a borrowed line about Scandinavian television. Scandi Noir traveled because the setting was strange enough to be interesting but familiar enough to follow. Too normal and there is nothing to notice; too weird and nobody can parse it. The sweet spot is a narrow band. Brands build their most distinctive assets there.
So the framework is not be louder or be cleaner. It is keep one deliberate oddity that the rational optimizer would strip out. That oddity is the thing that gets you remembered.