The Short Version
Geographic and cultural biases in Eurovision voting are well-documented but do not override musical quality as the primary determinant of outcomes. The most rigorous longitudinal study, spanning 45 editions, concludes that political voting "rarely determines the overall result" and that the best entry typically wins. The claim conflates the proven existence of systematic non-musical biases in point allocation with those biases being the dominant driver of who wins — a distinction the evidence does not support.