It's called a thought experiment. You need not actually be this type of person, but if you mentally leave yourself in their perspective greater understanding can be reached. It does wonders in RL, too.
Question: if I believe something is necessary regardless of what the subject feels about it, why would it matter what I would feel about it? The common intent behind such questions is to provoke empathy or to try and identify hypocrisy, but sometimes 'I would do the same thing' doesn't mean hypocrisy: it just means you would repeat the error or decision yourself, even if it were wrong.
To take an example: when I was going through training awhile back, we were posed with the thought experiment of 'what would you do if your family was held hostage?' Say that you are a leader of the police, but the criminal holds up in your house and has a gun at your spouse/child's head: do you do what they want? Order an assault? An investigation? Did your approach change compared to if it was someone else's family?
The answer the class came to a consensus as a 'best' answer was... remove yourself from the position of authority and let someone else take charge. The dominant argument being that a hostage crisis requires impartiality and objectivity to resolve favorably, and that having your own precious people being the hostages would be the worse thing for your state of mind. It would be best for you if you weren't the one in command... and that might mean your subordinates forcibly removing you against your will, so that it would be a relative stranger handling the negotiations.
This point, of building a system that will do the 'right' thing even if you would not if you were emotionally compromised, is both a terrifying and useful thing. It's terrifying because if it's wrong, it can be very hard to correct. It's also very useful by identifying and resolving conflicts of interests before they happen, and mitigating the human weakness of biased perspectives.
So let's say I'm a mage who is more or less like me now. Maybe I accept the rational of the system: the closer I am to myself now, the more likely I would be a Loyalist. Different context would change me, though, and who knows how much. I might be personally abused and/or affected by abuse, and so come to oppose it.
But whether I like it or not if I were in the same position is irrelevant to whether the system is appropriate or not. Good organizations don't bend to any individual's opinions, even my own, and good systems don't bend to any single group, especially the views of the group it is intended to maintain.