The Infinite Corps not sensing that the Dark Spirit Race was targeting them is somewhat inaccurate.
They simply didn't have concrete evidence, just some suspicion, and weren't too sure.
After all, isn't plundering a common thing done by the Dark Spirit Race?
Those attacked were not solely the merchants of the Infinite Starfield; there were other merchant ships as well, and the attacks didn't always happen within the Infinite Starfield or even its surroundings. Some were hit right as they set sail.
Is this definitely targeting them?
Of course, after a long period of time, they eventually realized.
No matter what the Dark Spirit Race's goal was, at least the end result showed that the Infinite Starfield suffered greatly and their development was heavily affected.
Although not completely cut off from the outside world, external trade required enormous effort and a significant deployment of forces for escort missions.
The efficiency of trade and transport depends on safety.
