A pickup game only stays fun for both sides if it's competitive — a mismatched game where one team is stacked with the strongest players is over as a contest within minutes, and that's usually what kills a weekly game or a casual tournament's momentum over time. Fair team-splitting isn't a nice-to-have, it's what keeps people coming back.

It also removes a genuinely awkward social moment: someone has to pick teams, and whoever does it — deliberately or not — tends to be accused of favouritism, especially if they're playing themselves. Handing that decision to a transparent, verifiable shuffle (with a reproducible seed) takes the politics out of it entirely, since no one can argue the split was rigged.

The same logic scales up to real competitions: professional drafts use the snake pattern specifically so no single team can stack all the top talent, and international tournaments use pot-based seeding specifically so the strongest teams don't eliminate each other before the final. A weekend five-a-side game and a FIFA World Cup group draw are solving the exact same fairness problem.