I think it is properly rated. If you only have restrictions against vocabulary then you still have all the other liberty and you can advocate a repeal of the law that bugs you.

I suspect the censorship you were noticing was self-censorship in order to avoid adverse public reaction.

A legendary animated show spells out that you can only use the word "shit" metaphorically, e.g. "I feel like shit". I have to admit that most of the time I prefer people would go easy on my ears if they have to talk literally about defecation.