Presumably the bronze sculpture was still produced with the authorization of the artist in a limited series and thus still represents their original work and in

Presumably the bronze sculpture was still produced with the authorization of the artist in a limited series and thus still represents their original work and intent. I think the key difference is that viewing a sculpture doesn't implicitly grant me a perfect replica of said sculpture that I would be free to save, duplicate, and even mint my own NFT for were I so inclined. Digital objects are not scarce in the way that physical objects are.