For me, as a game maker, it is very important to see at a glance if a game asset is AI-free.
If the "No AI" marker (less of a warning and more a mark of quality) would be removed, I couldn't be certain if a product is AI-free or if the author just hasn't answered the AI disclosure question (esp. on older assets where the disclosure is not yet mandatory).
Since I refuse to use assets in my games unless I have confirmation that they are AI-free, removing this information would mean I couldn't buy assets on itch.io with the same confidence as I do now.
When browsing games, where disclosure is optional, positive confirmation that a game is AI-free is also important so I know that a game is worth my time.
As it is right now, the information does exactly what it is supposed to do.