Rules have change, the way the sport is played now compared to back than. The athletes now are faster, stronger and have more agility.
That's true, but at the time, the best were the best and we shouldn't take that away from them.
But this brings up an interesting new topic. If our athletes are faster, stronger and have more agility, no doubt because of improvements in training, nutrition, etc., then how does that fit with the idea that traditional martial arts is somehow superior to "sport"? How would a 5 foot tall, 100 pound Okinawan man from 100 years ago, in his loin cloth secretly practicing nothing but kata and makiwara in his backyard by moonlight fare against today's average UFC fighter? Will those secret pressure points hidden in the kata really be enough to take Lyoto Machida or Brock Lesnar down?