I think the answer is: Every planet must have its own customer base. Products from other planets will have an elevated taxes (for the risks).
I think too, every planet must development its own economy.
If you bring 100 apis you don't risk them getting looted.
If you bring 100 lyst, or 100 time travel crystals (back to planet because you were foolish enough not thinking about lootable pvp would be implemented..) you risk them getting looted.
Well in other words: Crafters on other planets where there might be an insufficient number of miners have a hard time to compete with pre-manufactured good on Calypso where the materials have been brought to the crafter with no risk of looting. And "taxes" on pre-manufactured apis is likely to be lower than on materials because there is no risk in hauling apis, but there is a risk of bringing lyst. Especially if you're not associated with a top-level fleet.