@Ansuman0 Many hosts have outside cameras, which need to be disclosed in the listing information. While I don't have any myself, because I just rent a private room in my home, there are many reasons that hosts have cameras that don't have to do with surveillance of guests. Some off-site hosts need them to see whether their lawn maintenance or pool cleaners showed up when they were supposed to, to have a record if someone should break into the house, either while it's unoccupied or while guests are in residence. I'm sure if there was break-in and guests had their belongings stolen, they would be grateful that the thief was caught on film.
And of course, hosts need to make sure that guests aren't sneaking in more people than they paid for, pets, or throwing a wild house trashing party.
But beyond that, most hosts are busy people and really have better things to do with their time than sit and watch or listen to guests go about their daily lives. It's about as interesting as watching paint dry.
Inside cameras are totally against Airbnb policy in private spaces, like bedrooms and bathrooms, and very few hosts would have them in living room or kitchen unless it was a hostel-type situation, where there are multiple unrelated guests sharing space. Those would be for the purpose of being able to determine who is leaving the kitchen a mess, disturbing and grossing out the other guests, or in case a guest says "Hey, I left my iphone on the coffee table and someone in this house stole it."
And indoor cameras also have to be disclosed. Airbnb has heavy penalties for hosts who don't disclose surveillance devices, so it would be a very foolish host who woukd risk such a thing.