Aren't NSFW filters good enough for family friendliness in America?

There are, of course, things which are not suitable for children, frightening things, disturbing things, content related to immoral behavior.

But if you ask an American, the destruction of life is far more suitable for children than it's creation. Patreon has no qualms hosting videos fantasizing mass murder and death [1] even when those videos are obviously aimed at children [2]. Is this really family friendliness or merely some strange flaw in our psychology without moral or philosophic basis?

[1] https://www.patreon.com/posts/dreadnought-epic-13951713 [2] https://www.patreon.com/posts/103684