Countless histories have already proven that cultivating core forces inevitably requires nurturing young talents. Although for cultivators, the hundred-year-old age in the mundane world is not considered much, people at this age are no longer pure in heart.
Training such individuals is often risky.
Today, they might receive benefits, but tomorrow, instead of gratitude, they might seize the opportunity to take even more.
Of course, young people who haven't experienced much of the world might also not understand gratitude, but statistically speaking, they are more likely to be appreciative.
Moreover, the younger generation has not yet solidified their paths in Dao cultivation. If suitable, they might even change their cultivation path. On the other hand, those who have been practicing for decades or even centuries are unlikely to change.
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As the sun rises and sets, time flows backward.