Why Fantasy Swords belong in Fantasy (not elsewhere)

Mega swords, super swords and all other kinds of made-up dragon-slaying swords belong where they rightly exist–in fantasy!┬áBut why do they belong there, and not in real life? In Earth’s historical reality, the European one-handed arming sword has become a well-known and predictable symbol. But in popular medieval fantasy, whether it be in video games, books, movies or comics, the European sword has become a target for unpredictable creative reinvention!