There is no hard and fast rule, but the less mainstream a movie or TV show is, the more accurate the IMDB rating is. When something is released with great fanfare, everyone under the sun chooses to share their two cents, and a lot of it is not very nuanced or useful. Add to that superfans, woke warriors, xenophobes, purists, trolls and others, and you can drown in extreme views. But, with some discretion, it is still a good guide to make a viewing decision on unknown fare.