To open and maintain the Eonrift entrance for newly awakened individuals—who needed to take their trial in order to activate their powers—a large amount of energy was required.
Each time the Federation opened the entrance to Eonrift for the newly awakened, it consumed a massive quantity of cosmic energy stones, along with other precious resources such as boundary stones, which were essential for stabilizing the spatial channel that led to Eonrift.
There were trillions of humans in the Genesis World, and every day, countless individuals reached the age of sixteen and underwent their awakening.
After awakening, all of them were required to enter Eonrift to activate their powers.
Opening Eonrift for the newly awakened consumed a significant amount of resources, and if the Federation were to open it daily, even they would feel the sting of the cost.