The Victorian Historians are responsible for a LOT of false commonplaces in society.
Things like the idea that Anglo-Saxons were uneducated, on the basis that they didn't leave reams of written works. The Dissolution Of The Monateries saw to the loss of MANY such books. The Battle Of Maldon (I believe) was found recycled as lining for a foreign book!!
The modern artisan's flaw is based on the same mistake that the Victorians made - They see a picture of a chap clad in armour with a big sword and assume it's heavy. They make something the same size from whatever metal, not knowing how it was made, and find a 15lb sword, for example. The next assumption is that all swordsmen were built like Arnie just to lift the damn thing.
Truth is, a Broadsword is about 2-3lbs at most. With something that light, you can easily fight for extended periods!
It's only recently, thanks in part to re-enactors and history enthusiasts, that original pieces have been properly examined and properly reproduced by modern makers.