last time i saw that user's profile, all of the posts were sexual. many of them not even really memes. posts about having intercourse with old men, wearing revealing clothes in the club and so on. i don't think any of them were tagged, so the user themselves doesn't care and apparently neither do the mods of the communities wherever it was posted to.
no one's pushing the nsfw users out, just wanting a mechanism for users who don't want that stuff in the timeline to filter it out. why should people play whack-a-mole with people who don't tag their horny posts properly and people who keep remaking accounts every other month?