The fourth season of the Ascendance of a Bookworm anime, produced by WIT Studio, premiered on April 4 this year, though to an unexpectedly rocky start. The long-running series was faced with serious backlash after the reveal of the animated opening sequence, which viewers suspected featured AI-generated assets. In response to the criticism, WIT Studio posted an official announcement on April 10, in which it states that upon investigation into the opening’s production process, it confirmed that generative AI was involved. Consequently, the opening sequence recently published on YouTube has been removed from the platform. ……



Why would you think this? Comercially, the opening is pure advertisement for the show and for the music in the opening. Artistically, they can do whatever the hell they want.
Almost no anime do this, what are you on about? It’s a deliberate choice of art style, nothing more. And either way, why would this be a “sin”?