You kinda can. Life isn't a comic book, and if you saw Elon Musk when he was 15, he wouldn't have any special aura of destiny glowing around him. I'm not saying that everyone can grow up to be Elon Musk, but he didn't have any sort of special license which allowed him to do it, either. In the end, superheroes are composed of people who try to become superheroes even though the rest of the world spends the first decade thinking they're committing lese majeste because they don't have a superhero license.
Great point. And if you look at Elon's record, he's shown a pattern of setting increasingly ambitious goals after working his way through (relatively) easier projects -- e.g., going from two software startups into hacking hardware, going from trying to contract with existing Russian rockets to designing and building his own rockets, going from modifying an existing car into an electric to designing and building his own electric car from scratch.
