First of all, the tennis analogy is faulty and you know it: one game is about athletes competing against one another in a sport, another is about gamers trying to out-think, out-predict, or counter-team each other.
. . . and that explanation still leaves me wondering what you're thinking. Putting aside the fact that in many sports (like my own wrestling/judo) out-thinking, out-predicting and counteracting the opponent's strategy is a HUGE part of the sport . . .
I could say this: "We don't celebrate Chess/Go/shougi/(insert other strategy game with a pro-level league) because of it's awesome ruleset-- we celebrate the players who demonstrate excellence at it!"
That's what "competition" is about--
demonstrative excellence. Not good rule sets. This applies to sports, games, art . . . it really doesn't matter. So yes, the analogy is quite fair.
Let me give another analogy. A sports one. Recently in international wrestling (Greco Roman/Freestyle) it was decided that the game would be played in rounds instead of periods, meaning that the score would reset to 0/0 at the end of each round, and the winner of 2 / 3 rounds would be declared the victor. What this meant is that it would be impossible to sit on top of a lead and stall out a match-- from start to finish of each round, you'd have to be constantly working and attacking to get through the opponent's defense and score more points.
It was the equivalent of banning spikes/stealth rock/healing moves. A serious change of rules that put a huge emphasis on high-speed, high-strategy, aggro wrestling-- specifically with the intent of making wrestling a high-action, better spectator sport.
It was a HUGE change in rule set. Still, were most wrestlers arguing back and forth about the consequences of the new rule set and contemplating about whether it made the game better or not?
Um . . . NO. They were doing what they always have been doing-- training, training, training. Perfecting their skills, strengthening their bodies/minds, and sharpening their technique. Where necessary, adjusting strategy/game plan for the new rules, but ultimately-- the focus is on one thing:
WINNING!!!
That my friend, is competition at its finest.
I think that Smogon has a duty to create the best metagame possible within the confines of what Game Freak has given us to use.
Um why? This is where there is a fundamental difference in thinking, because I really see no real value in this. The value is in the team building, strategy, and execution, not list-writing.
Especially when there is no way to define "Best." It's called a "portrait of uber" because we all know it's inherently vague, and they're called outlines because we all know it all comes down to subjective opinion, and in the end there is no right or wrong.
One of the arguments for Garchomp being Uber (in late DP, not now) was that it could sweep with the entire metagame standing on its head to stop it. A mediocre team with a YacheChomp could immediately become a solid team, and overall, YacheChomp was an inimical influence on the metagame, shunting aside a diversity of strategies and devaluing player thinking in favor of a game in which players competed to set up Chomp and stop the other Chomp. The debate right now is on whether Salamence and Latias do the same, and if so, to what extent.
What's your point? The issue regarding Garchomp was much more obvious to the majority of players-- Garchomp forced an unprecedented call to attention in its tiering, and forced the beginning of a testing process that previously was unpracticed.
Neither Salamence nor Latias has caused uproar anywhere near that degree.
The bottom line is though, and this is where argument really ends--
is that I don't really care if Salamence or Latias are OU or Uber. I mean I do, but not so much that I'd spend all my time bitching or whining if the council decided one way or another on it. Seriously. There are far more productive things to focus on. Like winning (though obvious I haven't been doing all too much of that recently, lol).
After garchomp was banned, there has been an overwhelming positive consensus about that decision. If we simply banned Salamence, we'd either see the same thing or we wouldn't, and leave it up to the discression of the council to come out and say "we fucked up," if it is was bad, or leave it if it was not-- but either way, the decisions to ban or the decisions to overthrow a ban should not be made unless there is a real serious problem at hand-- that the game is unplayable in its current state. Really, what the process needs is a good dose of good ol' Common Sense imo.
Do Salamence or Latias make the game unplayable one way or another? I say no-- but even if the council were to say yes, the point is that the vast majority of the community should not spend all their attention worrying about that issue. It really doesn't matter all that much.