Consistency sells but is really hard to ensure in time bounded series of narrow discussions with changing participants. But this must not discount the value of the preceding often frustrating search for understanding the requirements and prototyping. Throwing away the prototype while all the lessons are still in the head can yield great design.
In feedback solicitation situations with multiple stakeholders, it's important to attach cost to suggestions. Consulted without being responsible is always a dangerous offering.
Not in the sense of "This is how long that will take me" (because who cares about someone else's time?), but in "Of the 3 things you requested, which 1 is your must-have?"
Often this is approximated via design/dev team pushback, but it's easier just to be explicit about it: i.e. everyone gets X change request tokens.
This is why, when you've got a bunch of geeks deciding on where to go for dinner, someone has to say "We're going to the Jewel of India" and herd everyone out that way. If you don't do that then it'll be 11pm and people are still pulling up restaurant reviews and arguing over whether the one that got 4.3 stars really is better than the one that got 4.2 stars.
This is also the difference between a supremely dysfunctional and an OK-ish standards committee, the classic Home of Bikeshedding.
You can't say "no" to a restaurant without voting "yes" to an alternative. The first restaurant to a majority wins. Is it a perfect system? No. Do I get to eat in a reasonable amount of time: yes.
That's just like hiring McKinsey et al - the true value isn't the advice itself, it's probably been written down by some poor intern working 80 hours a week yet billed to the client as "director" time, the true value of why these consultants still get hired despite their truly abysmal track record is that management can use that "external advice" to cut through red tape and plow over internal resistance.
LLMs however... they give part of this power to lower levels as well. After all, what is an LLM other than the condensed knowledge of humanity? (Partially /s)
They were happy that someone finally made a decision, and freed them from the burden of fruitless repeated deliberation.