You can totally run things in authoritarian manner, gathering consent in instrumental way and use outside sources (like sales) for validation. But downsides/side effects/intentional features not said out loud are well known and researched to the point where one has to intentionally choose to remain ignorant of them to sustain a different narrative.
The other key aspect is that it's just far more efficient. My last few jobs have espoused being highly collaborative, but in practice what that means is that everyone winds up in the proverbial room. Chaos ensues, nothing ever gets decided.
So at the meeting, only hitches to the (expected) plan are expected. Not building a plan from scratch. Its more like a standup than a bull session.
https://files.manager-tools.com/files/private/podcast/mp3/ma...
Likewise, if a meeting is where you adjudicate something, you need consensus to focus on the key issue, whatever that is. Otherwise, you’re likely to head into some rabbit hole that results in no decision.
The problem being solved is that most ideas are not good, so any single person with an idea looks to vet it among a trusted group of advisors/peers. If this group is too large, it's hard to deal with the noise, too small and it may kill or ok an idea when it shouldn't be.
After refinement with the smaller group, an idea now has enough substance to bring to the larger group and hopefully not waste their time.
A simple example this process helps avoid would be pulling together the full group, presenting an idea, and then legal killing it with their first comment. Everyones time was just wasted since the idea as presented had legal issues and needed more refinement.
Wadge’s Law (of Meetings).
Before every formal meeting there’s a smaller, more exclusive, less formal meeting where all the important decisions are made.
This is based on decades of experience in academia and friends’ experience in industry and government. Sometimes there’s an even smaller, more exclusive, less formal pre pre meeting where all the decisions of the pre meeting are made. Maybe even a pre pre pre meeting … until you reach some guy deciding everything in the shower.