[dabinat]

I stayed at an Airbnb once where they had a sign on the fridge saying that they considered anything less than 5 stars to be a negative review.

[legitster]

To maintain your Airbnb Superhost status, it's required to maintain an overall rating of 4.8 stars or higher.

So, yeah. It's not just that hosts are egotistical. Airbnb punishes you for 4 star reviews.