Imagine a fan who puts twenty dollars on their own team, then watches every pitch with more attention than anyone in the stadium. The other side says that bias corrupts judgment, but banning the bet does not remove the bias, it just moves the transaction to an offshore book with no consumer protection, no audit trail, and no way to flag suspicious patterns. Regulated betting keeps the money visible and the market monitorable. Match-fixing is already illegal; the real choice is between a supervised market and an unsupervised one.