Well, said, Russell, as regards the enforcement of chastity. As regards the choice of chastity, or the obedience of chastity, however... well, there is perhaps more to say (although you hint at it, honestly).
I can see both sides. Why would I want a dog that would not remain at heel when commanded to do so? On the other hand, am I willing to leash the dog to train it to come to heel and remain?
It occurs to me that the question is more interesting as it regards the mind of the sub, as opposed to the equipment itself.