@Henrik90 Unless an Airbnb guest has a long-term booking, over a month, they are not a "renter"- they are a short-term guest. Same as if you stayed in a hotel- the cleaning staff, security, and other hotel staff do not require permission to enter.
I respect my guest's privacy and don't enter their room during their stay, unless they ask me to for some reason. But I would certainly enter if I thought there were an emergency situation, like I saw smoke pouring out under the door, or the one time it started raining and I noticed the guest had left all the windows wide open- if I hadn't nipped in for 15 seconds and closed them, she'd have come home to a soaking wet bed.
I can assure you that the vast majority of hosts have no interest and better things to do with their time than to be snooping through a guest's belongings or checking to make sure the guest is being clean and tidy and hasn't left a lamp on.