Basically force powers in the oot depended on hereditary characteristics and training. But the force was infinite in its ability to be tapped into.
In the prequels we are told the more Midichlorians a jedi had the more power and potential they have. Anakin having a higher midi-chlorian count than yoda.
Therefore the stupidity of the prequels turns the originals into Luke and Leia were effective Leaders and fighters for the rebellion because they were passed Anakins midichlorians,lol.