Google “design by committee,” and you won’t see anything good. The phrase is a pejorative term for a project that has many designers and no unifying plan or vision.
That’s said, I’m seeing this approach more frequently these days when it comes to cloud architecture, which is disturbing. I’m not sure if it's due to the pandemic and the need to get people engaged remotely, or the lack of skills that is pushing important decisions to groups of people.
If you’re as old as me, you remember architecture steering committees. These were groups of IT leaders, typically from different departments, such as security, databases, development, etc., who came together to decide on a holistic architecture made up of technologies that everyone could agree on.