As written before, consistency is important. But sometimes we need to catch up with work and tasks. Then it is important to prioritise our activities.
When you know there will be a messy meeting and there is nothing you can do about it, the best thing to do is to avoid it. Messy people produce messy meetings, and they take the time and the energy of everyone who is part of it. That is why instead of being part of this drama, find a better team and better meetings to invest your precious energy.