Ok, but without a doc, collaboration in a meeting can become inefficient in many ways. Folks can talk past each other, bouncing between unclear options and losing clarity on what they are even debating. Only one person can talk at a time, so folks are sitting and waiting for their turn, etc.; Strong personalities can dominate and filibuster.
Writing even a bad doc ahead of time can help to make the meeting’s purpose clear. The author can guide the discussion by laying out and labeling big options and decision points.
While reading the doc, everyone can comment in parallel, so you aren’t serializing the conversation for small things or letting some verbose person waste the time.
Reading during the meeting helps folks manage time outside the meeting. It means: you don’t have to prepare for meeting you don’t own. It avoids “random people” assigning you work beyond what they are asking you for in your calendar. For busy managers this is a huge benefit.