Musk pointed a rocket at the sky and pressed play. In terms of difficulty, boosting a car into an extended orbit is trivial. Manoeuvring a "space plane" to intersect multiple satellites, grab them and return to earth, that is orders of magnitude harder.
Ford make cheap cars world wide at volume, and pioneered the production line.
as for point one, like me, he was in the right place at the right time. I am rich because I joined the right start up and got bought out. yeah I worked hard, but not anywhere near hard enough to justify the money I got.
The same with musk.