It does come down ultimately to a question of semantics... the use of the word "jailer" seems....sad, mournful. Protective custody I suppose would be another way of putting it. There is little freedom in being in any kind of custody whether it be for ones own protection or as a method of punishment.
As humans, we have evolved into the most mentally superior animal on the planet. We have learned to domesticate, cultivate and adapt in ways that no other creature has achieved. My cats, my dogs, my horses are all victims of early humans need to manipulate their surroundings. Domestication in itself is a restriction of freedom. Most of us do not abuse the responsibility of our rank at the top of the evolutionary ladder, unfortunately there are a few that do. Now that our ancestors have gone through the process of domesticating what was once wild and free, it is left to us to continue the restriction in the most responsible and humane ways that we can. Is this a moral dilemma? It has been for me in the past most definitely. I don't really think it's something we have much choice in though. So just as I am my horse's keeper... my freedom is also restricted by having the awesome privilege of the responsibility.