This apartment is not a room within a host apartment. Instead, the apartment is shared with another Airbnb guest, not the host. There clearly is no vetting of the individuals you have to share space with.
I had really inconsiderate co-renters who came in at 2 am, and crashed around, drunk, for an hour. They left food, boxes and clothes strewn all over the common areas. It was very disrespectful, and ruined the stay.