Perhaps because power corrupts, or perhaps because we promote people into managerial roles because they're excellent at their jobs, and we assume that they will pick up the people skills, pick up the management skills along the way.
Porque o poder corrompe ou talvez porque contratamos pessoas para cargos de gestores porque são os melhores no seu trabalho e assumimos que irão adquirir as capacidades sociais e as capacidades administrativas, com o tempo.