No, he was exactly right. That says "may" because it's just a comment, not F-Droid's actual definition, which you cut out:

> This Anti-Feature is applied to an app that contains content that the user may not want to be publicized or visible everywhere.

https://f-droid.org/docs/Anti-Features/#nsfw

That is clearly not applicable to the vast majority of these apps' users as evidenced by their outrage.