I was going to ask y'all all about this but since you've alluded to it, minus well piggy back on this....when it comes to punching power, are fighters "born" with that or is it something that can be added via technique and mechanics?
I ask because when I listened to RJJ commentate the JMM-Pac fight, he mentioned weightlifting helping him in his knockdown and knockout of Pac man when he was never able to KD him in their 3 previous fights. The KD and KO punches were punches he was landing in the first 3 fights but it didn't floor him.