It is known that monster-minded people have destructive nature. Robbing this nature is like having a limb but using it. It is certainly not killing them, but it still annoys them. In the worst case, they may just lose their self-control and go on a rampage.
Therefore, Angus couldn't ask Anna to stop them from being destructive without a good reason. He also knows that monster-minded people are people who don't mind being found out by others or regarding their safety.
In most cases, monster-minded people only rampage when someone exposes them publicly or pushes them too much.
Although Angus didn't have much detailed information about these types of people, he still knows they are people who just do what they want without thinking about repercussions. In fact, he has already experienced this with Anna many times in the past.
