As I write this, the 2019 Chicago Cubs have not scored a run in two and half games. In September. When you need to win games to win a division and/or make the playoffs.
The Cubs currently do not have a single player hitting .300 or better. What you have is a lineup of power hitters, and as appealing while the home run is a fan favorite, relying on it is not winning baseball. This lineup is too easy to pitch against.