That’s true, but also let’s consider the overwhelming superiority of these weapons, compared to empty hands.
If a competent swordsman or spearman or staffman etc faces off against an unarmed opponent, with sufficient room to wield his weapon freely, and with freedom to use lethal techniques without holding back, then that unarmed fellow is going to die.
The notion that one can build unarmed defenses against these weapons, without somehow creating a situation to stifle the use of the weapon first, I think is fantasy.
That doesn’t mean it wouldn’t be a good exercise to go through, and it could be fun training. But seriously, the outcome is pretty much a given.