Pep Guardiola's mythology is more specific and ordinary than what's commonly said about him. He's convinced he can think soccer into submission. Which is probably what many coaches think, but they're not as bright or committed or fortunate.
The only factor preventing Real Madrid, Barcelona, and Mourinho from winning every trophy is the entire world. Unseen forces accentuate any storyline. Referee conspiracies are not a bug, but a feature.