I don't remember where, but I read from a blog article that 5-star reviews are unreliable, when used by the general public, due to ignorance on how to properly

I don't remember where, but I read from a blog article that 5-star reviews are unreliable, when used by the general public, due to ignorance on how to properly rate. The proper way would be to ditch 5-star reviews in favor of just "thumbs up" and "thumbs down", youtube-style