There is no myth. Both Trump and Elon have generational talent in their respective domains. This is the kind of talent that’s so unique, it creates its own domain that didn’t exist before, and that no one will be able to replicate after.
But they’re both unstable, and have many other negative features.
One can have an extraordinary talent in starting generational companies, and have a social media addiction (among possibly other addictions and problems) that makes one unstable. These aren’t mutually exclusive.