In the ancient world, it was more about skill and tactics than sheer power. You can utilize tactics to take advantage of power, but in the end it comes down to skill.
Think about modern machete fights: https://www.youtube.com/watch?v=1OzAlCCa3xU
The action starts about 1:45. If we correlate these fights with ancient blade fights, I don't think there is too much difference. If you notice, at 1:50 one opponent runs away. The fight continues with another opponent but breaks off even after some fairly heavy hits.
Here is another: https://www.youtube.com/watch?v=dbJ2YZv1yGY
What do these have in common? Even unarmored, the human body is capable of taking multiple cut from a sharp object. The men who go into battle will more than likely be armored. Weaponry from that age was made of inferior metal and tempering. More than likely, wounds from arrows were far more dangerous than cuts from swords and knives, not only because of piercing but sepsis.
With regard to the David and Goliath argument, David could have had enough power from the sling to kill Goliath. It takes 3 kilo-newtons spread over an area of 30mm to kill someone. It has been proven that it is difficult, but not impossible.
https://www.youtube.com/watch?v=cK5lqNhk3bI
As far as my conclusion: it's not the dog in the fight but the fight in the dog.
Think about modern machete fights: https://www.youtube.com/watch?v=1OzAlCCa3xU
The action starts about 1:45. If we correlate these fights with ancient blade fights, I don't think there is too much difference. If you notice, at 1:50 one opponent runs away. The fight continues with another opponent but breaks off even after some fairly heavy hits.
Here is another: https://www.youtube.com/watch?v=dbJ2YZv1yGY
What do these have in common? Even unarmored, the human body is capable of taking multiple cut from a sharp object. The men who go into battle will more than likely be armored. Weaponry from that age was made of inferior metal and tempering. More than likely, wounds from arrows were far more dangerous than cuts from swords and knives, not only because of piercing but sepsis.
With regard to the David and Goliath argument, David could have had enough power from the sling to kill Goliath. It takes 3 kilo-newtons spread over an area of 30mm to kill someone. It has been proven that it is difficult, but not impossible.
https://www.youtube.com/watch?v=cK5lqNhk3bI
As far as my conclusion: it's not the dog in the fight but the fight in the dog.