Because the torch relay was introduced by Carl Diem at the 1936 Olympics and there is no evidence that such a thing ever occurred in the ancient games. It is therefore, arguably, little more than a NAZI propaganda tool that people decided was quite nice and have subsequently shrouded in myth and bullshit to try and cover up its ideologically suspect origins.
Because the torch relay was introduced by Carl Diem at the 1936 Olympics and there is no evidence that such a thing ever occurred in the ancient games. It is therefore, arguably, little more than a NAZI propaganda tool that people decided was quite nice and have subsequently shrouded in myth and bullshit to try and cover up its ideologically suspect origins.