The Short Version
This claim presents one side of an unresolved philosophical debate as though it were established fact. While mathematical Platonism — the view that math exists independently of human minds — is a legitimate and widely discussed position, it competes with formalism, intuitionism, and other views that treat mathematics as a human construct. The Mathematical Universe Hypothesis underpinning many supporting sources is a speculative minority position, not scientific consensus. The claim is not false as a philosophical stance, but it is misleading as a statement of fact.