Does anyone know how his squares with Long copy marketing which often violates both (well 2 is subjective verging on tautology) his requirements? Write short w

Does anyone know how his squares with Long copy marketing which often violates both (well 2 is subjective verging on tautology) his requirements? Write short when trying to capture those deciding on throwaways, write long when trying to convince or swindle erm assuage the uncertain?