The Kardashian family media approach used to be Swiss-watch precise: First, an event in the public life of the family happened, and was covered by the tabloid press in its moment. Then, some months later, the event would be the subject of an episode of “Keeping Up With the Kardashians,” their E! reality show, in which the siblings discussed matters direct-to-camera. This could prompt a whole new round of chatter, one in which the family controlled the narrative. With their new series, Hulu’s “The Kardashians,” which Kim Kardashian and her mother and sisters executive produce along with Ben Winston, the...