Agreed. Also, given the nature of his lofty goals at Spacex, they're going to take a huge amount of his time to make happen.

Musk is very much motivated by progressing humanity. At this point, the electric car and solar revolutions are well underway (thanks in part to him). But if he were to die tomorrow, it's very possible that a lot of his dreams for space travel would die with him. The industry just hasn't reached the same level of competitive self-sufficiency.