That's a recipe for a tool that impresses the hell out of new/casual users but doesn’t work.
It’s the same reason you should never choose an oncologist using yelp reviews.
I don't understand the argument you're making. I'm grateful to have not had a need for an oncologist, but I would assume that honest reviews from patients whose cancer is either in remission or not should be relevant. What am I missing?
Yelp reviews for doctors are all about how nice the doctors act and how much they tell the patients what they want to hear. It's not like people leave an "I died, 1 star" review.