Swords (and all other melee weapons) are unrealistic is just about every video and role-playing game with âstatsâ for Strength and Agility etc.
Just about every weapon benefits from both being strong and for being agile. Most martial artists arenât exactly bulky guys, but they can swing swords, axes, maces etc. with ease. On the other hand, if youâre strong but clumsy, you end up missing your swings with axes and maces, or hitting at an angle that gets deflected by armor.
Another point that is often neglected is that two-handed weapons actually need less strength to use properly than one-handed weapons. The leverage and control are a lot better when you have both hands on the hilt.
And yes, as LostBrythunian said, most swords are pretty useless against any form of armor. Or at least youâd need to grab the sword at the blade and smash the enemy with the crossguard or pommel - just as most medieval swordfighting manuscripts instruct.
The greatest advantage swords have over other weapon types is - theyâre cool. Thatâs why theyâre ubiquitous in all fantasy and mock-historical fiction. The only historical army of significance that armed its soldiers with swords as their main weapons, rather than backup weapons, was Rome (and one might argue the even for them, the shield was the main weapon and the gladius was just the tool for killing). And the Legions were optimized to fight in tight formations against mostly unarmed barbarians, and they struggled mightily when facing other heavily armored armies such as Scythians or some elite Gauls.
Spain also tested using rodeleros with swords and shields to support pike formations and to flank enemy pike formations in the 15th and 16th centuries, but the rodeleros turned out inefficient and too vulnerable and were phased out pretty quickly. They had better success fighting against lightly armored native Mexicans as what became known as Conquistadors.
But when we see movies or games where heroes are in focus, theyâre usually wielding swords, cutting through armor and bone like wet tissue paper. Conan, Aragorn, Geralt etc. all use swords, and theyâre really cool. But itâs fantasy.