I think they mean the reverse: since dark matter gives a possible solution to some of the unexpected observations resulting from the current theories, so if the

I think they mean the reverse: since dark matter gives a possible solution to some of the unexpected observations resulting from the current theories, so if the theories later change, they are hoping the dark matter/energy terms will vanish. I likely have about the same physics knowledge as them, so I don’t speak from authority. But dark energy is not just a small fudge factor, so current theories seem unlikely to change by that much. As mentioned in the article, we have some measurements now also consistent with the existence of dark energy being pervasive, not just the appearance of it in theories.