Comments of chapter undefined of As Mahito in Naruto

People without cursed energy are not able to kill a cursed spirit, even if you drop a nuclear bomb on it, no one will die or even suffer because there is no cursed energy in a nuclear bomb, but if it is filled with energy, then the spirits will die and why can they see him that he is a man? and the human body is not able to withstand the changes that mahito made with his own if he dies if he changes the body too much, he is physical and not spiritual, so he needs to heal with reverse technique and not with energy like all spirits