Harry Potter tends to jump first and ask questions later, running headlong into danger without much consideration.
Sometimes there’s simply no replacement for pure enthusiasm, which seems to be what Daniel Radcliffe thinks he had over other contenders for the role of Harry Potter.
However, it’s also important to have passion when playing Harry Potter, because it’s something that the character himself very much has.
If Daniel Radcliffe showed that he had the ability to play that sort of character, then it is possible that love was the reason he was cast.