a thing with the nsfw filter in the fediverse generally: there is a school of thought that people should treat "content warning" somewhat like an email subject line - basically marking everything nsfw if there is any chance that anyone might find it offensive. Not subscribing to that point of view myself, I tend to block anyone I encounter who adopts that practice because it is so annoying - but I can also understand that some people of very delicate sensibilities might appreciate being able to protect themselves from things that are not well-behaved kittens. TLDR, this is why a lot of people don't turn on their nsfw filter - because in many places 90% of the so-called nsfw content is actually sfw, but evokes food, alcohol, politics, violence (yet of the sfw sort), or controversy.