1. What is the main goal of this proposal? Do you think shutting down game servers at night is a fair way to achieve it?

To shift young people's focus and time spending on video games to study, as well as make them sleep earlier . 

Despite it seems a direct way to settle the addiction, I don't think it will work.  First,  it's hard to carry out because players will have multiple unexpected ways to break in if they are banned.  Second,  there are lots of ways beyond games,  like short videos and novels.  

Third,  it doesn't touch the core of problems. 

I think so. As long as parents allow their children to use their identity to register accounts, the rules are easy to be broken.