Cultivating energy there was still difficult, just as it was anywhere in the dimension. The purpose of this place was not to help the survivors advance in levels, but to improve their powers, their physique, and understanding.
It was their duty to raise their cultivation in 'normal' areas of the universe, where it was possible to go far when facing challenges. But in order to inherit the position of Celestial being, certain opportunities could only be seized during the tests of inheritance.
Minos realized this point as soon as he started cultivating at level 5, feeling the pressure of the area to make him understand more about the laws of cultivation he had trained for centuries in his life. Not only that, his Divine-grade Physique seemed to vibrate in response to the area, a sign that put a smile on his face.