She is saying that you are too focused on the immediate situation to see the big picture.
The destruction of Amarr spaceships and allied vessels in orbit, and the “charlie-foxtrot” caused by the mass deployment of rebel space stations in orbit of an Amarr core world is absolutely invaluable when we consider the larger war going on, and the Amarr Empire will be much more severely weakened by the loss of such ships then it will be by the loss of whatever troops may be lost on the ground.
To put it bluntly, I’l probably kill more Amarr with a single battleship destruction then you will Minmatar in your entire campaign down on that planet. And since multiple vessels of that class have been deployed so far, yes, the space battle does matter.
It may not resolve the situation in Thebeka, though it certainly makes it easier for TLF smugglers (like me, hey ho!) to get down there and help. But this is a very, very large conflict of which Thebeka is only a tiny, tiny part right now. In the long run, what happens in space will prove much more meaningful then what happens on the ground.