The solution is trust. Crowd sourced reviews are junk because you don’t know who wrote them, what their intentions are, or if they are in any way qualified (whatever that means to you) to review a book. With well known and trusted reviewer, you understand their biases and can adjust accordingly.
I don't think the issue here is about mmm individual being able to trust reviews. It's more about authors being pressured to write along certain lines due to hordes of basically bots upvoting/downvoting.
