More cargo-related questions! ( a tangent, actually)

[Freyland]

Thank you all for your responses on my previous double-post regarding cargo. A new, yet related question: In my first game, I have my powerful homeworld in one system and a new colony in another system. I was concerned for the safety of said colony, so I had my bored homeworld make some satelites to stuff in my newly created cargo ship (thanks to you all). On the same turn I start the cargo ship on it's merry way, I hit the build que on the colony planet and realize I can build the same satelites on the colony in the time it takes for my cargo ship to arrive! So, again, am I missing something? I realize the importance of troop transports, carriers, and "people-movers" (sorry, from Detroit area ), but is there an actual value to transport ships when you can build whatever you want at the destination instead of shipping it across the universe from point a to point b?

As always, thank you very much.

Jonathan