Zhou Tian was different from the living beings of the current world; those creatures had grown accustomed to the rules of their own world. Thus, while the rules of this world seemed ideal for cultivation to Zhou Tian, they appeared utterly ordinary to the creatures of that other world from any perspective.
Therefore, because one was an indigenous creature and the other an outsider, their perspectives on the same issue naturally led to different conclusions at that time.
The lion had grown used to everything here and believed eating other living beings to improve its cultivation level was a matter of course. Under these circumstances, its daily routine was much like Zhou Tian's, yet its fundamental goal was merely to hunt for food so it wouldn't starve.
However, Zhou Tian's situation was entirely different from the lion's.