[quote=duck55223]
Or I can just open up a tiny hole in the shield temporarily to allow a single freighter to past through and supply fuel. I don't have to lower the entire shield. Plus the stations also have small stockpile.
[/quote]

And to control shields to THAT degree with just some runes and gems is a bit OP, don't you think? That's like throwing up a shield with all your concentration, and then still focus enough to pick up a waterbottle, and pass it through the shield.