Vlad
As with the related question, you seem to think "safe search off" means "show me porn whenever possible if I’m in image search". For me, it means "show me NSFW when it makes sense".
Text search for Zima Blue pornstar has the main results about Zima Blue, some others about a pornstar called Zima. Dropping pornstar from the query has zero pornstar results. Yet on image search 90% are porn images (potential of her? I don’t know).
With your logic, the text search for Zima Blue should also be full of porn results. This is exactly the same issue as with the English Motherfucker ticket (where only the combination triggers it, not motherfucker by itself). Some queries switch to show mainly porn for image search for no clear reason.
If for Kagi "safe search off" means "show porn on image search, behave like all other search engines for text search" I feel like you should make that clear, not that I can understand what possible use that has.