This statement was just to set the scene.
Everyone knows that theoretical physics is simply using mathematics to interpret existing findings and conclusions, and there's a high probability that most of it is wrong. In fact, from the perspective of the discipline of theoretical physics, whether it is correct or not is not important.
But the outside world thinks differently.
Many people may think that a physics theory must be correct to be meaningful.
This is a mistaken perception.
If a theory can explain many existing findings but is ultimately proven wrong, the process of debunking it can still foster progress in physics. Failure is the mother of success; without wrong theories, there would be no correct ones. The ultimate purpose of proposing a theory is to provide a direction, not to 'ensure correctness'.