Why is forgetting to place your chosen champion in the chosen champion zone upgraded to a Game Loss if the opponent calls a judge after opening hands are drawn, rather than remaining a Warning?

Ruling: Forgetting to place your chosen champion in the chosen champion zone is upgraded to a Game Loss (when caught by opponent after opening hands are drawn) because it creates significant game integrity issues and awkward scenarios that cannot be fairly resolved.

Nuances:

• After game one with sideboarding, there's no way to verify which champion card was intended as the chosen champion if multiple champion units are in the deck
• Leaving the chosen champion in the deck gives an unfair advantage by increasing the odds of drawing that card in the opening hand (relevant for decks running multiple copies like Kai'Sa)
• The harsh penalty is intentional to motivate proper game setup and prevent exploitation
• If the erroring player catches the mistake themselves before opening hands, it remains a Warning
• The penalty structure unfortunately incentivizes opponents not to point out the error before the game starts