This is true. But rockets are a tiny bit more specialized. For instance, SpaceX and Blue Origin both build their own engines. That’s not the norm in aerospace.

This is true. But rockets are a tiny bit more specialized. For instance, SpaceX and Blue Origin both build their own engines. That’s not the norm in aerospace. ULA buys their engines from other companies (including, in theory, Blue Origin) while jet engines are almost never built by the companies that build the rest of the jet. Also, in this case, Blue Origin is only building half of the moon lander. The other half is Lockheed Martin and friends. It might have made more sense, in theory, for Blue to design the whole lunar lander instead of just the bottom half. The NASA reports specifically called out the integration risks from this approach as a problem. I don’t know if it’s actually faster to outsource the upper stage of the lander to LockMart or if they just wanted to take advantage of LockMart’s proven ability to win massive government contracts, but you don’t go out of your way to talk about how many states you’re doing business in unless you’re making an appeal to Congress.