I developed this theory on team sports rather as a matter of fun and as a good point to have a good argument upon, but it has matured into a better theory which makes sense.
My initial statement was that team games/sports are only played by people who's abilities are average or below average, because only they can benefit from other team members. Any player who is above average will soon get frustrated with the others and will have to walk out.
However, this has a lot to do with motivation, not only ability. So the above statement was retained, but 'ability' was replaced by 'motivation'. So now it read like this: Team games can only be played by people who's motivation is below or equal to the average, because any player who's motivation is above the average will get frustrated by the others' lack of motivation and walk out.
However, two truths remained to be added:
Firstly, it can be said that a team can be broken down into indivisual players, all of whom have very specific tasks to accomplish. The overall matching and fitting can be left to a coach or manager, who's dedicated job is only that.
Secondly, both the theories above assume that the sense of joy felt in a team sport is owing to the success of the team as a unit. That is, for example, in football, the joy that each member achieves out of playing in the team is dependent on how many matches the team wins, and how many tournaments or championships the team wins. This assumption is incorrect, because when specific tasks can be set to every team member, it is possible to derive pleasure not from such "material" victories, but personal victories achieved in the specific task. In this case, a player plays not for cups and glory, but for the pure joy of achievements on a personal level, which do not require anyone else's acceptance. Thus, this sort of player plays for a different cause, i.e. , the cause of self-discipline, commitment, dedication, etc.
With the acceptance of these two truths, our theory fails completely! But I hope that we have got a better understanding of team games, and people on the top of such games. So we can assume that Sachin Tendulkar, when he is playing cricket, just comes, bats, fields, does some bowling, all to the best of his capacity and does not bother much about anything else. I don't know if this is true, but it seems like a likely method of achieving excellence in team games.