That's simply a statement coming from somebody who has not expended the energy to keep up with what's happening in the field. Sweeney's two books are a total cure for the problem.
Hoffmeier is a leading scholar in the field and an effective critic of the minimalist position. The subtitle of his book is "The Evidence for the Authenticity of the Exodus Tradition". I suppose he could have missed those theories about the pyramids being built by little green men.