No, but I have sympathy towards all the people that had fallen victim to the abusement of a mage unnatural power. It's not because what they might do,it's because what they will do. Just look at the Imperium, mages running around free becoming magisters, owning SLAVES, sacrificing people to blood magic. Tranqulisation happens if mage cannot pass his harrowing,which I perfectly justify, because why would you let a demon puppet into the world. How many more examples do people need, I'm not saying Tempalrs are perfect and not corrupt,but mages cannot be allowed to exist outside the Circle. For the sole reason that they are a danger in all of their life, they suffer every single night, and are exposed to Fade threats always. Imagine just imagine if the Templars are gone, who will stop a demon controlled mage, a few oridnary soldiers, who have no experience in dealing with such things , or a Templar who trains all his life to protect people from the abuse of magical abillties.
The fear of the imperium's return wouldn't even be an issue if the Chantry and templars didn't jealously guard the secrets of templar training. In fact, the fear of the imperium's return could force the nobles of nations to acknowledge and fund the necessity of public education, at least the necessity to read and mandatory templar training. Alistair's exact words were "You don't need lyrium to learn templar talents. Lyrium just makes templar talents more effective." He didn't even have to take lyrium until he became king. Everybody wins: peasants can learn to read and defend themselves against magic, kings can have an anti-magic reserve army at the ready in addition to his own templars answering directly to him, and mages can have freedom to go outside and actually use their powers responsibly and to the betterment of society. but what do I know? I'm just a guy who desires progressive society reforms, enlightenment and harmony among people. Pro-templars seem to prefer constant war, ignorance and persecution.
In addition, I would have you know that treating mages with dignity instead of hunting and imprisoning them would most likely lower the use of blood magic. Mages are driven to it because of the system. Not all of them are like gollum from lord of the rings, desperate for power and would make deals with demons. The very fact that they could get possessed themselves using blood magic is a powerful deterrent. Understanding of the downside of blood magic would make mages not want to use it but the system is putting a gun to their head and driving them to it. Ironically, the Circle's oppression is the cause of most of the mage's use of blood magic. All of it could be avoided but the system has to change. Is it really that worth it to maintain this terrible status quo just so templars can play the mundane's savior?