I always have hated that phrase because I believe there's always an edge for one team or the other, I think there's never an exact 50/50 game/match.
However, even if you believe in "coin flips" I still think it's inaccurate. In reality, I sports betting is more comparable to American roulette. You choose a side like red or black but it's still more complicated than that. I think the single zero would be symbolic of incompetent/corrupt/mistake prone umps/refs (I think everybody knows about how the Pirates were recently robbed in the 19th inning) and the double zero would be symbolic of injuries/suspensions/fixed games etc.
However, even if you believe in "coin flips" I still think it's inaccurate. In reality, I sports betting is more comparable to American roulette. You choose a side like red or black but it's still more complicated than that. I think the single zero would be symbolic of incompetent/corrupt/mistake prone umps/refs (I think everybody knows about how the Pirates were recently robbed in the 19th inning) and the double zero would be symbolic of injuries/suspensions/fixed games etc.