Well, you can say that even the clone Alex also knows that something definitely happened, and because of this, until now no portals appear on earth. As you can see, all of those fighters also know the same thing and because of this, all of them were also preparing themselves for that kind of situation.
Naturally The Spiritual energy of the earth already increases and because of this many things already happen. Most of the animals of earth already mutated because of the spiritual energy and not just only that many more people also began to awaken and The Spiritual energy.
Really, you can say that if those humans and dwarfs are able to absorb The Spiritual energy like those Monsters then they would have already reached a new limit in this kind of situation. But unfortunately as you know they needed to rely on those spirit stones to absorb The Spiritual energy.