If you are referring to the title of the post, that was referring to the unwanted appearance of the games in browse. Not their existence on Itch.
Of the 1 million games here, about 2% are nsfw. A flood of nsfw, that is taking over itch... Maybe you should browse different tags, if all you see is nsfw.
If Itch is "flooded" with something, it is horror, and I blame youtube.
it would be nice to have some sort of strict SFW option for the site
Content — How content on itch.io is shown to you
( ) Show content marked as adult in search & browse
Please make sure you have this option deactivated in your settings. And make sure to give Itch a feature request that they should not block this setting, just because an account has uploaded a nsfw game (Should one of your games be marked as such and your setting is blocked because of that).
Because what you say is how Itch does work. There are pitfalls, unfortunately. You can still see that content, if you select certain tags. Their workaround is to not have those tags in the suggestion box. And you can see those games on profiles.