What cornfused is saying is that, if the game is close, your starters will already stay in the game longer (compared to if it is a comfortable 12-15 point game that doesn't trigger blowout status). It's already programmed into the game as "common sense" (for lack of a better term) that if a game is close and down to the wire, a coach will want their best players (starters) on the floor in an effort to win.