Infallible Prophecy

This seems like the most logical explanation for how that old hermit/sage/wizard always manages to find the chosen one. A hero so righteous, so pure and so utterly bloodthirsty that of course fate/destiny/gods selected them and only them to be the saviour of the world/cosmos/racially homogenous kingdom. And of course, despite their undeniable destiny, this hero would never go on to do great things if they didn’t receive a helpful nudge in the right direction from older and wiser heads. Sometimes prophecy just needs a helping hand to make sure it doesn’t get lost along the way.