You better hit it correctly, because the cue ball position after the break shot will be towards the side rail.
For every advantage, there is a disadvantage.
The opening: The break shot. There isn't much to say here. It is not a place for a safe shot.
The mid-game: Any point in the game at which you DO have a realistic chance to play a safety that will give you ball-in-hand (BIH).
The endgame: The point at which there is no realistic chance to play a safety which might give you ball-in-hand (BIH).
In every game of 9-ball there is a "point of no return"--a point at which playing a good safety (a BIH safety) becomes unrealistic. This point of no return is what separates the mid-game from the endgame.
In the endgame, defense is possible, but only by leaving your opponent a tough shot. The problem with that is, even terrible players make tough shots occasionally. Depending on your opponent to make a mistake is a terrible position to be in. This means, the endgame is the MOST DANGEROUS part of 9-ball! In the endgame, if you make any kind of mistake, you will probably lose.