Once you create a theory, and talk about it often enough, it becomes real and everything else will stem from that theory.
Dark matter is still theoretical, but, explanations for everything that occurs or is observed in the universe. has become dependent on something that is still not proven to exist. It’s like all strange things that have no explanation in the world can be explained by the existence of ‘ghosts’.
Not just ghosts. God. Blah blah blah .... and then a miracle happens!