I've confirmed this is false using the clapper-massive-rotten-tomatoes dataset on Kaggle which contains reviews up to 2023 (so note the scores are different than current scores): there are in fact many movies that have high hot-or-not scores but are clustered near the 6/10 threshold among top 10% of movies according to number of reviews: e.g. The Peanuts Movie, The Good Lie, Gimme Danger, Dream Horse, etc. (filtering on reviews with numeric scores)

These are all movies with (at the time) >90% "approval" rating but average score about 7/10 with most reviews around the 6/10 threshold and tapering down at 7/10,8/10 (as opposed to being multi-modal/split-opinion, e.g. many at 6/10 and many also at 10/10).