If I got suddenly teleported to the court of Genghis Khan and proposed we vote on who’s in charge, this obviously doesn’t work.
Genghis Khan was, in fact, elected:
All Great Khans of the Mongol Empire, for example Genghis Khan and Ögedei Khan, were formally elected in a Kurultai; khans of subordinate Mongol states, such as the Golden Horde, were elected by a similar regional Kurultai.
This is a deeply misleading characterization of that study.