This is a community site that tries to cater to everyone and everything. That's why there are the options to only view the local instance, subscribed communities, and all is for everything. The price of censorship resistance is that it takes extra time to subscribe to communities of interest and to block things that are not of interest, and things are still more cluttered than they need to be. I get the desire to get through that filtering process faster and easier, but Lemmy and the other Federated services are still in Beta, are running on volunteers and shoestring budgets, and are dealing with with some other major issues. I think that over time the things people are asking for will get implemented, but it will take longer than on other corporate entities. You may want to transition to a smaller instance from Lemmy.World that fits your interests better and doesn't have as much of the content that you dislike. Also, try be patient, continue to subscribe and filter to your likes and dislikes, and if it's not there, maybe take some time away from Lemmy and check back again in a few months.
Someone went out of their way to create a bespoke response for when a user blocks an NSFW community. It immediately asks you if you'd like to block all NSFW or just the community in question. There is no other subject given similar treatment.
I may want to stay on the instance I'm currently on and occasionally poke fun at notions like this, because that's a good way for me to help better frame my thinking and share it with others. Even if it's in a silly place like showerthoughts.