This only captures half the equation. The skills of creation and the skills of promotion seldom occur in the same person. Most great promoters are con artists;

This only captures half the equation. The skills of creation and the skills of promotion seldom occur in the same person. Most great promoters are con artists; most creators and inventors can’t sell. Elon Musk is a person with the promotional skills of a con artist but who actually knows how to do things. He can sell a vision and then also is a good enough engineer to make the right high level design choices and hire the right talent to have some chance of realizing it. He also seems to have the intent of shipping. A good percentage of master promoters are conscious con artists with no desire to actually create value. (Most of the rest are delusional unconscious con artists.) SpaceX has built the first economically reusable booster and is rapidly iterating on the first economically and fully reusable (including the second stage) heavy lift launch system. Tesla validated the market for EVs and is in many ways still the best EV maker. I strongly doubt the EV revolution would be happening so fast without Tesla. The competence part is not even mentioned here. The world is full of master promoters. The vast majority of them sell snake oil.