You’re quite right to point this out. Yet at the same time: To a very great extent, and for better or worse, Musk has become the face of American futurism. If the public at large gets the idea that Elon Musk is insane, that notion could broadly damage our prospects for the adoption of solar power and transport electrification.
(There are plenty of other “tech” CEOs of course, but I don’t think they count as futurists. They mostly deal in social software that serves trivial desires rather than needs, and they’re not really in the business of making new things possible, not anymore. We already have social media everywhere, and Facebook, Instagram, Twitter and the rest are literally records of the past, both the recent past and the less recent past. There will be evolution in social media, of course, but the revolution there is over.)