It seems implausible, on its face, that the by-far most energetic processes in the universe are driven by the by-far weakest force in the universe. We know that

It seems implausible, on its face, that the by-far most energetic processes in the universe are driven by the by-far weakest force in the universe. We know that electromagnetic fields are deeply involved in focusing the jet -- beam, really -- coming out. It beggars imagination to insist they can have no further role. Do we have any reason to believe no fusion is occurring in the process?