The problem of authenticating art before this, for a digital artist, was that you HAD to have a gallery do it with you in order for it to work. No one trusted anyone, not even the artist, to say that there would only be "10 copies" of that digital artwork, since they couldn't do any follow through if the artist decided to say there were ten copies but sold 10 000. This was an issue with digital art that was previously only solved by the reputation of X art gallery - the art gallery would say - "we certified only 10 copies, and our reputation as a gallery protects this artwork from being certified again".
With NFTs you just do it. The problem was gatekeeping, the need for an "authority" to certify your signatures on digital art, and the process involved. NFTs are a click of a button and a few dollars to mint.
Does that answer your question?