The reason I am generally skeptical of the technology is the same reason I’m not going to try to give you a definition.
I’ve never seen it solve a problem or be proposed as a reasonable solution to a problem. What happens instead is that someone says “could we do BLOCKCHAIN for this, it’ll make it way more modern” and the subset of people that want to look really forward-leaning and cool say “YEAH”. If that subset of people is loud enough, a lot of money gets spent and a bunch of implementers have to figure out how to jam in something they can say is blockchainy… leading to a proliferation of definitions.
The results have been universally more expensive applications with fewer helpful features. I don’t like “blockchain” because everything that touches it gets worse.
I’ve seen that math and something like that could work. Elon turned off the spigot on falcon heavy launches to create a bigger market for Starship.
Blue’s lander aggregates in a manner similar to what you describe, as did NASA’s original government reference design.
The other thing you’re talking about is basically Gateway. You’re pitching (more or less) the NASA concept circa 2019. :)