How does minting with manifold prove authenticity of the art?

I read in the docs: “Manifold Creator ensures the NFTs it mints are authentically attributed to the creator themselves. As a result, collectors can be assured the NFTs they purchase are 100% genuine, backed by the creator.”

Sorry if I’m slow to understand, but how does minting with manifold prove authenticity of the art?
Couldn’t any copyminter just as easily mint a stolen image with manifold?
What am I not getting?