But you forgotten the village people also affected by the moon. This group doesn't know to mold chakra/ninjutsu & taijutsu...
that scene led me to believe that by "power", it was probably supposed to be taken as meaning their life force. If not, then it has to mean ppl were always genetically predisposed to carry chakra ever since Hagoromo imbued ppl with it, only one needed to have the aptitude to learn how to wield it:
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The above illustrates how ordinary Nagato fairly was until he tapped into Rinnegan using his rage. Fast forward to when he met Yahiko and Konan and they were seemingly just as ordinary. It wasn't until after their encounter with a lone ninja where they realized they had chakra and realized they needed someone to teach them how to wield it:
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