Isn't a manager's ability to substitute limited in every sport, in different ways?
In baseball you can't reinsert a pitcher or position player who has been taken out of the lineup, for example.
But you can put someone different in, if not a someone who'd already been in the game. You're largely not required to have Player X for subsequent plays in if he's melting down.
You don't usually hear this exchange in the stands:
"Get that guy outta there!"
"He can't until two more batters..."
