Actually I don't think the goal of Aikido is to control the attacker without injury, that is just a hippy philosophy that was grafted onto the art by post WW2 public relations, compounded by misunderstandings and poor translations of deeper philosophies. The consequences of an attack are determined by the intent of the attacker meeting a correctly trained body. Wether we are talking takemusu aikido or Aiki in it's truest sense, the response has no time or space for choices. If there is an
ethical imperative, it is to do no more harm than necessary to stop the attack. Once again the choice is the attackers. Correct training in any genuine martial art allows for escalation on the force continuum according to the rebound or absorption of incoming energy.
Oh, I don't think so either - but that's the usual line...