If Facebook or another company with goals that may not be clearly noble did it people may question their motives more. I also believe these is a natural higher level of trust in people like Elon Musk who have more praise worthy missions set for their companies than let's say someone like Mark Zuckerberg, ie. Elon wants humans to have a backup plant and is taking actions to save this planet, he seems to have dedicated his life to that mission, Mark maybe not so much.