As someone who needs to live in a clean environment I have to takes Sana side on this. Personally I start getting annoyed and feeling dirty when I see the house. And NO ONE can deny that their house is absolutely disgusting.
She asked people to clean it up because there is no way it would happen after the task. So if everyone is sitting there, they can get up and just wash a few dishes. They would still be able to conduct a conversation regardless.