It's funny you brought up SpaceX because that's one of the examples I was going to use for my previous comment. SpaceX's early work was almost exclusively funded by government contracts (which they could then use to borrow against). Musk himself said they were down to the 11th hour of bankruptcy before NASA 'saved' them. Their SpaceAct agreement also gives them the benefit of NASA's past science; they aren't starting from square-one, which is part of the point. The SpaceX business model follows that of many nascent industries: rely on the government with its extraordinary tolerance for risk until they prove themselves viable enough to get private customers that are generally more risk adverse. Aerospace is a prime example, dating back to the Wright brothers. The govt provided a lucrative military contract as a carrot that transformed the space from hobbyist to a legitimate industry.

And that's what I'm saying. I'm not introducing a dichotomy but you may not understand the point. In a hybrid model, high-risk ventures are funded by the government because there are few comparable entities that can shoulder that risk burden. Once the industry proves itself, it opens itself up to more private ventures. The government funds and sets goals, and the private sector innovates and delivers. That's not a dichotomy and most of the examples you provide that I'm familiar with support that model. I'm not denigrating private or public pathways, just acknowledging each have aspects that can compliment the other.