This is due to the fact that what this powerful figure said was not without basis. Why do cultivators form a pill only after "Foundation Establishment"? It is akin to constructing a building, where you must first lay a solid foundation and build a framework before you can pour in the contents.
Of course, the formation of a Golden Core is not as structured as building a house, as it forms in one single process. However, once the framework is set, no matter how hard one tries, they cannot break out of this mold.
Perfecting both the "framework" and subsequent "pouring" leads to a Flawless Golden Core.
In contrast, a star forms by amassing matter through natural forces, without a skeleton, allowing more energy to be contained.
Regrettably, all efforts end in failure, even the mighty figure himself admitted that his idea was just a moment of inspiration without any feasibility.
