if you search for NSFW, you are actively looking for adult content
I disagree. This might be splitting a hair to you. But you do not search for adult content, you search for games tagged nsfw/adult or whatever. Tags are meaningless on itch. They are chosen by the developer. I can have a book with adult or mature themes, that is definitly not nsfw (it is text), and tag it accordingly for the tagging mechanism. The tag description even says so: "For adults, often containing sexual or mature content." It does not read "For adults only."
That is actually what my thread is about. You cannot search for adult content. You can't. Seriously. You can only opt in and search for other stuff and adult content is not hidden in your browsing. You do not know, if it is actually adult content.