@mynekoheart it's because they failed to balance the game properly (and the fact that people aren't abusing the easy stat gain at the library is really dumb. If a game were to make that a function in reality, everybody would be abusing the wisdom stat gain from reading everything before leveling. Even if you want to go a fighter route, you'd still need to do that in order to get a high magic defense to stay even remotely competitive. Following that the entire rest of the game balance would break down since lower level magic users could hunt higher level mobs with relative ease).
As for easily taking down the other player, the wisdom stat boosts everything related to magic including his magical defense to well above lvl 200 magic user power. As it stands a similarly leveled non-magic DPS player could take him down in a surprise attack (probably).