The difference being that the latter is in no way similar to "playing a game". I specified several times that it's not about any literal similarities or differences in the activity itself, but the idea that playing one game that doesn't matter is not more important than playing another game that doesn't matter. You say it's not a question of being physically demanding, then immediately say it's to psych yourself up for physical challenge and punishment. If that were literally all it were than yes, it wouldn't make sense in non-physical competition. Yet some of the most aggressive trash-talkers are the fans of a sport, who literally aren't doing anything but watching. Fans of one team will scream at the fans of another as if this has any impact on the people playing hundreds of miles away, or affects the odds of the game. This is seen as normal and acceptable, certainly more so than for "outsiders" seeing the same behavior from videogamers, even the ones actually playing.Psyching yourself up does nothing to improve your actual ability.It's about protecting yourself from distraction and fear, to keep yourself from losing focus, coming into the competition with lack of confidence hindering you, and setting up your own fall. Likewise, antagonizing the opponent isn't about any actual impact on their skills, but an effort to try and inflict those same distractions on them. Neither of these are physical things. Skill in a fighting game depends heavily on reflexes, which can be messed up by distraction. The question remains, what makes it more "legitimate" in one competition over another? Actual danger to be involved? That seems like the worst time for people to be distracting each other.
You are just going around in circles trying to prove your point.
You want to know what makes it more legitimate? what makes it more legitimate, is that it takes
cojones to go out there and get in a ring knowing you are going to get as much as you are going to give. It takes cojones to put up a football helmet that has a big sticker in the back that says "playing football may cause death". That sometimes, your commons sense is telling you one thing, and you need to tell yourself another because of the task that's in fornt of you. Playing video games, not so much. It takes nothing but a bit of dexterity in your thumbs. So this whole idea of sixism, bravado, and trash talk within a "culture" or competition in which the participants aren't exactly what you call men's men, to me, is ridiculous, and laughable.
My 9 year old boy has been playing Modern Warfare since he was 8, and he constantly beats kids much older than him in multiplayer. The kid has off-the-charts pattern recognition and finger dexterity (actually documented because of a minor physical condition). He sees a litany of taunts, insults, etc (again, anonymous taunts from punks sitting in the safety of their homes) while playing, but his harshest taunt?: "I am 9 years old". So pardon me for not seeing the "professional gamer" scene as anything more than what it is: kids sitting on a couch mashing buttons hoping they can mash them faster than the other guy.
As for fans trash talking, I can understand a sport like football or soccer inspiring passion amongst the fans, because there are other things involved in following a sports franchise which usually has your school, city, state or country included in its name, etc.. but I just don't see Call of Duty of Battlefield inspiring that kind of passion, and if they do for anyone, I'd feel sorry for them.