'Everyone' is a blanket category that includes every possible entity, including yourself. Using this metric, then the answer would be no, your continued detention would not be to the benefit of 'everyone.' If you were to narrow this to simply what would be best for a majority, then more variables must be accounted for, but the answer still amounts to 'no.'

[He turns his head now, watching Akira's face for his reactions.]

During this past Triple Moon event, the number of individuals who sustained physical damage as a result of your loss of control from Sanguis when compared to the overall population of this world is a negligible percentage--the overwhelming majority of the population remained unaffected.

Furthermore, you only risk this loss of control during the Sanguis and Triple Moon phases, yet you remain lucid when the Sanguis moon is not present. During this time, there is no objective benefit to anyone in you remaining imprisoned.