I think you are getting confused thinking kuti muroyi wese ane chikwambo chemari. Which isn't the case at all.
Mbashto yemari doesn't mean munhu iyeye anenge achiita zveuroyi during the early morning hours just after midnight.
Kune varoyi who just put spiritual curses on other people so that they won't succeed.
But at the same time that won't add more zeros to their bank accounts unless if they bewitch boss wavo kuti vapihwe promotion, or bewitch a rival in the same line of work, etc.