The rating itself is not the important point.
The comments, why someone rates like this or that is for me an indicator about the "character" of a pin and if it fits to my view of "a pin with alot of fun to play".
When i read these points in other comments too, i see a validation and it helps for my next choose a bit.
So, if you hide the ratings, you hide the comments.
For me would it not be helpful.