Just came across a relevant article:

https://restofworld.org/2022/south-korea-star-ratings-trouble/

tl;dr “star rating terrorism” is ruining lives

It’s not unwarranted… on average, the right one has more 5-star-ratings after all

This is oddly the wiser option.

IIRC the mathematical way to go is imagine the next two reviews for each are 1 star and 5 stars, and compare the resulting values.

There was this video from 3blue1brown that was pretty cool.