What does the end of this world look like? They have already seen it. Moreover, they are very close to this end.
They don't hope that a hundred years later, they are still at that end, with no possibility of ascending further.
Leaving is something that all those who have reached the end want to do.
However, it is not that no one has tried.
Flying out into space, they can't survive long, quickly losing oxygen.
If they return a bit slowly, they will soon suffocate and die.
Who knows how many sages' corpses float in outer space, so now no one attempts to leave this way.
Because, this method is simply impossible to leave this world and go to another world.
Star Gate?
Many have tried this too, but no one possesses the authority to activate the Star Gate, so naturally, no one can leave.
In addition, countless have attacked the Star Gate, only to find that it can't be attacked, and it absorbs their power, rendering their attacks null.
