Being "on the same page" has two forms, one of which is healthy and the other is not.
In organizations where everyone is trying to achieve the same broad goal, but have different ideas on how to achieve that goal, people are much more likely to propose novel ideas or changes which are healthy, and the business more readily adapts.
In organizations where people are just saying "yes" to whatever the person above them said, important information that needs to bubble up cannot, mistakes are made, people are thrown under the bus, and it becomes a toxic hellscape.
On the other hand, I've seen organizations where leaders were not "on the same page" and that lead to constant inter-department struggles. One would end up, by accident or intent, undermining another because they didn't have the same vision or strategy for getting there. Until someone up top is willing to lay down the law, being a manager in such an organization is effectively no different than being a politician.
In organizations where everyone is trying to achieve the same broad goal, but have different ideas on how to achieve that goal, people are much more likely to propose novel ideas or changes which are healthy, and the business more readily adapts.
In organizations where people are just saying "yes" to whatever the person above them said, important information that needs to bubble up cannot, mistakes are made, people are thrown under the bus, and it becomes a toxic hellscape.
On the other hand, I've seen organizations where leaders were not "on the same page" and that lead to constant inter-department struggles. One would end up, by accident or intent, undermining another because they didn't have the same vision or strategy for getting there. Until someone up top is willing to lay down the law, being a manager in such an organization is effectively no different than being a politician.