[marcinzm]

> managers cannot disagree with each other in front of other employees

Two important points on this:

a) The thing about being a manager is that people listen to you and try to do what you want. Your words set direction. The words also get amplified as they go down the hierarchy.

b) In a larger organization, doing the sub-optimal thing in unison leads to much better results then everyone doing their version of the optimal thing separately.

Put together this means that managers arguing about which approach should be taken publicly can be problematic because each of their teams may decide to implement their manager's prefer solution. Which then leads to wasted effort, multiple half-supported solutions, political bickering and so on.