I don't get this argument. The US government has invested into a tech development. Which means that spacex seemed to have a good base to pull that off. I didn't see a line of other companies doing anywhere near that capability.
Also, everyone calls for government to take lead in doing stuff for the betterment of humanity, but the second that happened, everyone loses their minds. Make up your mind, are we ok with government doing stuff or not?
Well, shares are company value, not product value. And companies are valued by their ability to create value. A terrible decision usually doesn't mean much, and share price fluctuation is mainly speculative in nature. A large company may survive a bad CEO, and create value down the road. Even a crashing company has value, as it may be split and sold with a profit, turning shares into cash.
All in all, as much as I hate, EA for example, they have a strong position and can easily eat up failed releases for years to come. Many of their releases are payed off with only pre-orders.