Transforming a person into energy=a large yield atomic explosion.
That goes beyond converting into energy, that also involves then releasing the energy. There no evidence that a person's mass/energy is being release during transport.
T'Girl, there does NOT exist a magical energy form (EM radiation, kinetic, etc, etc) that does not explode into an atomic explosion if there is enough of it concentrated to equate to 90 kg worth of matter.
Unless you view matter as energy in the first place, that is. In which case, matter is the only exception.