What is gibberish to you probably makes a lot more sense to somebody who has had a year or two of education in physics. Maxwell's equations specifically relate the electromagetic field to the electrical charges that cause those fields. The origin of electromagetic forces is ultimately electrical charges. A curved spacetime is a bit like a field - just a four-dimensional one. It wouldn't make sense to explain electromagnetism in terms of spacetime curvature because the acceleration of a charge is not independent of its mass.