In the Interstellar Era, cultivation was the main focus of humanity.
But not everyone would have the talent and ability to be qualified enough to enter the peak interstellar universities and receive a proper education pertaining to cultivation.
Many were reluctant to give up on their cultivation dream and could only depend on themselves to continue striving on, preserving. With no genetic cultivation art, with no genetic potions, with no genetic martial arts...they had completely no resources and had to depend on themselves. They had to contend against others for it or even...seize it!
These people were all known as unaffiliated interstellar cultivators.
In truth, in the most backward region in the interstellar space, only a minority of the people could enter interstellar universities. And among them, the vast majority were all interstellar cultivators.