The problem I have with this other viewpoint is that it can lead people into a state of complacency, having the players justify themselves losing by saying "oh it was because it was a terrible matchup," or "oh, I lost because of this random event." By justifying your losses instead of analyzing them as a player and asking yourself 'did I do everything I could to prevent this from happening,' it impedes any sort of growth as a player and leads to mere indifference instead of truly pushing yourself toward getting better.
EDIT:
I figured it could have helped my argument, so I thought I'd mention it. It does pertain to what I've been saying.
No, all I meant to say was that Wario Ware's rewards for winning minigames are completely imbalanced and can have a huge effect on the outcome of the match that the player cannot adapt to at all (an extended period of invincibility will do that). There has to be a line between what is reasonable for the players to adapt to and what the players can't adapt to.
Now going back what I've been trying to argue, being that as long as the rewards aren't broken, that the player, by picking Wario Ware, has acknowledged that he can either obtain an advantage by winning the minigames or has to face a disadvantage by facing an opponent with even bigger rewards. The player should have accounted for that when he chose to play on the stage, and if he has to face a disadvantageous situation like that, he has to be especially careful to not get damaged too much while the opponent has that reward. If he's getting hit by completely avoidable circumstances and all he can complain about is how the extra damage caused him to lose, he's not seeing the big picture, which is, "why did I get hit in the first place?"
Yeah Raziek essentially put it right. The reason I have a problem with your definition of outplaying is that it can lead to people blaming their losses on something other than themselves. I can understand people being frustrated at having to battle more difficult matchups while dealing with stage shenanigans, but in the end, the only thing that's holding you back from being able to compete with the best is yourself. The amount of energy that's spent in various threads complaining about things can be used for so many better purposes.
On a related note, I don't get how my arguments are so hard to comprehend. They sound perfectly logical as I'm typing them.