None of this, ipso facto, can offer mankind any help in the rationalization of the physical world. It is not the fault of electro-magnetism that ten different theories exist for the 'explanation' of electromagnetic forces. Proper experimental science consists of the design and execution of simple experiments in which the result is the unambiguous revelation of a simple truth. The prismatic dispersion of white light into a spectrum of colors, the attraction or repulsion of parallel current carrying wires. The generator action of a rotating magnetized conductor, the numerology of the periodic table of elements and the rationalization of organic chemistry by the benzene ring or double-helix are such simple truths.
Some physicists call themselves experimentalists because they take data from experiments.
Others call themselves theoretical scientists because they dream the dreams of the paranoid and schizophrenic. What is useful for mankind is the simple observation of an experimental result which in itself creates a new world from the old. The world is round, not flat. The planets revolve around the Sun, not around the Earth. The benzene ring rationalizes organic chemistry.