The clue in your description is that you are a software engineer in management. I would guess that most if not all the other managers are from non-technical backgrounds. Thus they are directly or indirectly indoctrinated into MBA and/or McKinsey Management Consulting group-think. Only the insecure and their sychophants would instigate the sorts of practices that you describe.
Hate to put it bluntly, but you are attempting to swim against the tide by attempting any form of debate and examination of dissent. The management team around you have played their hand. It appears that you are vastly out-numbered.
You have two choices: go with the status quo; or the highway.