Exactly. A better way to look at it is that morality exists to emulate empathy, to essentially cover for our limitations as humans: it’s a how-to-be-nice handbook for people who don’t want to be or simply can’t be nice. Narcissists, sociopaths and psychopaths, of which quite a few idolized celebrities number, have the ability to use morality to cover for their deficiencies. Steve Jobs, a notoriously awful person who nonetheless built a star struck following, had capable people at Apple around him to be his moral compass. Mother Theresa had Roman Catholic catechism. Elon Musk has neither.
As to why those who build cults of personalities are the same who lack empathy, the psychological ramifications are hard to pin down partially because the reasons we develop as adults without empathy vary.