Playing the devil's advocate for your manager: maybe your particular group didn't have morale problems, but others did.
If management wants to raise the average morale, they need everyone to do morale-raising efforts, even managers who don't think their particular groups needs it. Hence why your team got the changes even though it was previously fine.
If management wants to raise the average morale, they need everyone to do morale-raising efforts, even managers who don't think their particular groups needs it. Hence why your team got the changes even though it was previously fine.