Why sports anime almost always use Single Elimination?

As the title states. The one big flaw of this system when used in the story is that the hero team must win all its games to advance the story, one loss and it’s game over, time to prepare for the next season if even there is one, and there usually isn’t one. Also, the way they distribute seeds is oftentimes too unfair for the hero team (they’re usually the bottom seed, duh) yet the villain team (which is usually the top seed) cruises through the tournament final with only much fewer matches, like maybe 1-2 as opposed to 4-5

Marvel VS Capcom: Infinite.

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Quote:

Marvel vs. Capcom: Infinite will feature a variety of exciting and accessible single player modes and rich multi-player content for new players and longtime fans alike.
In addition to single player Arcade, Training, and Mission modes, a visually stunning and immersive cinematic Story Mode will put players at the center of both universes as they battle for supremacy against powerful forces and a new villain.
Features
• Reborn Rivalries: Universes collide once again in this all-new crossover clash for the ages, where players select their favorite Marvel and Capcom characters and engage in accessible and free-form