Board Thread:Theories and Speculation/@comment-45444155-20200410191621/@comment-45444155-20200423030922

FlatZone wrote: People had to be taught how to use chakra in the series, P1 shows that the academy students had to learn from scratch and the normal citizens have no idea what it is or how to use it. So in reality they all possess it but I think Hag just taught them how to use it verbally and through sharing some with them and that would line up more with everything.

The manga clearly states that people received the chakra from Hagoromo because he gave it to them.