Consider the Cultivation Genre, for example. The primary concept was of mortals becoming cultivators to go against the heavens to cultivate and become immortals, or even Gods. The worlds forming the genre had their respective energy to sustain this growth.
If a cultivator wished to cultivate, he could absorb the ambient energy directly, or through Spirit Stones—or their equivalent in the world—that they could mine, precious minerals that would give them an evolutionary advantage, herbs and the likes that shorten their growth time, etc.
The world was capable of accustoming anything they wished to do in the form of Dao. If they wished to reach the peak through pill refining, it was possible. Through artifact refining, also possible. Through talismans, definitely possible. Through standard energy accumulation in their bodies, guaranteed to succeed.
An infinite number of ways existed. They only needed to be explored.
