D&D operates on the Open Space principles of -
Whoever comes are the right people.
Whatever happens is the only thing that could have.
Whenever it starts when is when it is supposed to start.When it's over, it's over.
Then there is the law of two feet, essentially voting with your feet. You are in control of your experience. If you have an issue you can't complain about it not being covered if you don't raise it. If you are bored or feel the topic has moved away from what is relevant to you speak up or move on.