Board Thread:Theories and Speculation/@comment-45444155-20200410191621/@comment-45444155-20200421060746

LegionZero wrote:

That is what hapoened after Hagoromo gave everyone chakra. Prior to that, it wasnt an ability people had

You don't get it. The manga clearly states that people reinforced their chakra, not the chakra they received from Hagoromo.