Probably because it has all but zero filters on the input and output. It took widespread media outrage about "grok show me her in a bikini" to at least create a filter that bans such things.

[1] https://counterhate.com/research/grok-floods-x-with-sexualiz...

Does the thing where it wanted to move every conversation onto the topic of "white genocide in South Africa" not count as a filter on the output?