For me it's very simple: NSFW can't have a general acceptable definition because it depends on culture, background and personal beliefs. There is no way for a collection of communities to have a common definition and even if they would have: enforcement and interpretation is still done by volunteers.
Therefore All is never safe for work unless I know that my tolerance is lower than all communities within lemmy AND I'm fine with an accidental penis or breast due to human error.
Lemmy.world is blocked by beehaw as well...