How about we bring up this argument: FEAR. Everytime you go play football, baseball, hockey, etc. there is the unquestionable fear of getting hurt, playing in front of a crowd, and mainly the getting hurt part.
I would never play a FPS in fear of getting hurt or dying, whereas everytime I played football, baseball, or basketball that was a big fear. Even for the biggest, toughest guys it is in the back of everyones' heads when they play. Of course when the adrenaline kicks in you don't think about it, but let me give you an example....
I'm going into my senior year in high school and playing American legion baseball against some of the best players in Georgia, including the current catcher for the Chicago Cubs. Now we had a good little hispanic shortstop, but he had an attitude and didn't like the fact I was a sort of walk-on on this team & they played together through high school. Anyways, I am trying out for this team and it is my first time playing on the same field as these guys. I get in the box & he is "pitching", basically just throwing batting practice, or so I thought. Well the first few pitches I am destroying the ball and hitting long bombs and making a good impression. Well this jackass decides to be a d1ck and throws one as hard as he can right at my head. I wasn't ready for it & only got partially out of the way, but took it on jaw. Now this guy had a cannon and the ball was going about 90mph by my guess.
Well I got knocked on my @ss and hopped back up spitting out blood and said I was OK. I hit some more and bombed em out some more, but something was different when I played for awhile after that. I played against Michael Barrett (C-Chicago Cubs) and I couldn't even swing the bat. He threw 95mph back then and I was frozen more by the fear of getting jacked in the face again than anything. Brandon Fowler was his teammate who threw about 90 and I did the same thing, just stood there hoping to get out of the box.
It went that way for most of the season and didn't get better until the real season came around the next spring. My point is if there is no fear of physical harm then it is just a skills competition and a mind game, but in a sport you risk your body to become a master of your talent, skill, and mind by trying to overcome fear.
Fear is what drives a player to get bigger, stronger, & faster because if the other guy is he already has a big edge on you & then it becomes a serious mind fvck. In gaming it isn't like that at all, in fact I play alot better against better competition because there is no fear, only determination & focus.