Yep. They’re probably better than anyone at making a complex system with literal moving parts that works 100% of the time, the first time. On a nearly unlimited budget, with a decades-long schedule. In an institution and culture that’s now a been around a lifetime, staffed with top-notch people.
That’s all perfect for what NASA does, but I wouldn’t recommend a management system that NASA uses to just anyone, just 'cause “da astronauts” use it. Not any more than I’d recommend drinking your own distilled piss to anyone.
I don’t really have an opinion on Agile, even, I just have a problem with selling it this way.