Stars aren't the issue, there are people reviewing books they haven't read. Books that are not even out yet with multiple 5 star reviews. Goodreads reviews and ratings are fundamentally broken. I choose not to contribute to it. The only thing you could do is verified reviews but since Amazon bought Goodreads that means people would be locked into the Amazon ecosystem and that still doesn't stop the bogus reviews and ratings. It just means they bought the book through Amazon.

I stopped rating my books at all on Goodreads. The rating system is broken. It's just a way for me to keep track of what I've read and to find more books I'd like to read.