Mean rating status calculations are exactly as the name implies, mean to hosts! One bad review can easily destroy a host's efforts to get or maintain star status and there is nothing we can do about it.
If a host gets several 5-star reviews and only one 1-star review, their ratings status calculated currently by mean (average) is pulled right down. A median rating is more reflective of the most common guest experience and would remain 5 or nearer to it...
For an understanding of the difference or to see what it would mean for you, check out: https://www.calculators.org/math/mean-median-mode.php
I believe Airbnb should show more fairness to hosts and change to median calculations of overall ratings of both guests and hosts. If we are going to be ruled by algorithms and metrics, we should at least have fair ones... After all, it is we the little hosts that bring profits to the platform and it's billionaire owner.