@RUD3DUD3
But it does make sense, if the MC is fulfilling the power fantasy of manga, anime, and fantasy RPGs from Japan or the rest of the world for that matter?
If you play a game with enchantment on items, would you not put on magic protection, dmg protection, and regen? Or just overwriting enchants with better ones?
Did you think that'd disrupt the global political situation? No, you'd thought that you'd be able to tank like a boss. Take fucking Skyrim; enchant magic resistance and +Hp or Hp Regen on armors, then absorb HP and Stamina on a melee weapon. Congratulations, that's the equivalent. Or use mods and get Magic Absorb, invis when crouched, poison immunity, etc you get the picture.
He doesn't have the common sense of a world of High Medieval to Renaissance, low-fantasy, a world that has countries willing to go to war with each other for resources.
He comes from our modern world, that is still in one of the most peaceful periods globally, where nations rather NOT go to a hot war, cause it'll cause WW3.
TL;DR dude's using game logic from a peaceful Japan inside a low-fantasy, high tensions world. That's what they mean by he lacks common sense.