Wait, let me get this straight.
Someone posts on the board that certain ACTUAL sword combat techniques did not allow for an opponent to passively defend and catch their breath (i.e. Second Wind) because of the aggressiveness of the technique, illustrating that in a life and death situation, there is little time for regaining one's breath and you consider that a non-valid analogy.
But, you consider a sport where none of the individuals are actually fighting for their life, where every 10 to 20 seconds everyone stops their heavy exertions, and where not every individual is even necessarily trying hard every single play (depending on how the play develops) to be a perfectly valid analogy.
ROFLMAO!!!
I'm sorry, but sports analogies are the dumbest rationale to support Second Winds that I've ever heard. Second Winds are there for combat continuation reasons (keeping every player involved most rounds) and for nothing else. They don't actually make a whole lot of real sense in a 36 second encounter and they didn't even exist for almost 35 years of the game system.
This is pretty darn funny that people are defending Second Winds as making actual sense in a real life or death situation when a foe is attacking, and using sports analogies at that. The person who covers up and tries to catch their breath in real life while being attacked is the person who is defeated (ask any SCA participant or a martial artist who compete in tournaments). In a real battle, there are no rules about not attacking the legs or hands, or not aiming for the head. In a real battle, the participants have to be going full out the entire time that they are being attacked. They can take a breather if they are not being attacked, but Second Winds are totally illogical if one is being attacked. Amateur nerd faux expertise not withstanding.