MC kinda dumb tbh, but wise man seems to be the most "chill" job from all of them. A merchant has to struggle to get the best, most accurate information, haggle with people and do a thousand things at once, especially when there's no internet.
Now imagine a wise-man, Gandalf, but without all the ring drama. Just reading all day chilling. Noone is gonna bother you when you have the title wise man. Maybe once a month the king of your country comes to seek advise, that's it.