You pass by a shop for warhammers and consider a weapon in its display that's almost two meters tall and has a head the size of a breadbox. In real life it'd be a weapon reserved for changers and breakers with extra mass or an ability to modify momentum. Maybe a tinker with heavy enough armor. Human-massed brutes wouldn't be able to do anything with it regardless of their strength, they'd just throw themselves around ineffectually. In fact, nearly every weapon store has at least one completely unusable weapon in its display, and even the average piece isn't much better. Polearms, axes both one-handed and two-handed, large and small swords, daggers, an entire store dedicated to machetes, hammers and flails and maces, they're almost universally unusable. Some are simply too big, some have serrations or jagged edges that should make them incredibly difficult to cut with, many are decorated in ways that'd cripple their structural integrity. Almost every weapon on display is more than a little bit blade-heavy. The exceptions are the offerings of the store selling "rapiers", which are actually fencing foils that'd be difficult to use as actual weapons.
this is either Anime derived or a canon change, because canonically part of SAO's HYYYYPPPPEEE was because of the effort that went into making sure the swords and sword skills were as accurate as possible. Most of the Sword Skills were designed using motion capture on master fighters.