I don't know John Smith, and I assume his idea is poorly thought out and crap. Musk has a positive reputation, and proven experience doing hard things. That gi

I don't know John Smith, and I assume his idea is poorly thought out and crap. Musk has a positive reputation, and proven experience doing hard things. That gives us a shortcut on the credibility analysis. We're starting from 5 out of 10 rather than 1 out of 10. Hearing other people's ideas is not a free process. There's an opportunity cost for it, John Smith's idea is more expensive.