Right! Instead of getting rid of Guwon, maybe they can have some new rules or policy changes. The MC can obviously get Guwon to change and make the town a better place...
Exactlyyy, he already persuaded Guwon to bend the rules to give the sick kid medicine and go on the outing. If he just explains those morals to Guwon- like, don’t kill people unless they’re a threat to life- Guwon doesn’t really have any reason not to listen to him. To Guwon, the rules have to be protected because keeping order is important, you just gotta show him that different rules can keep the order just as well
"...What we want is the freedom to live with dignity."
Sure bro. Until the townspeople actually have to come face-to-face with death everyday without a security blanket to fall back into. Humans can be way scarier creatures than monsters sometimes.