I think there's some nuance here -- my take is that SpaceX has a very good balance of knowing when going slowly and carefully is critical (launching important c

I think there's some nuance here -- my take is that SpaceX has a very good balance of knowing when going slowly and carefully is critical (launching important customer vehicles, launching crewed missions), and when it's critical to move fast and iterate (eg, every other time). SpaceX has blown up a LOT of vehicles via mistakes, by iterating fast and learning from them. They use these as learning experiences, and if they can get a few satellites up in the interim, that's great (see: the starlink launches on re-used rockets). But when it comes to launching actual astronauts, they checked every one of NASA's million boxes. NASA and Boeing are unfortunately incapable of operating in fast-and-loose mode, even when it would be better to iterate and break a few rockets. The two-mode operation is why SpaceX dominates, and likely will continue to crush.