Is this a problem of the game i.e. being able to bet on anything (someone’s decision) or problem of someone having insider knowledge/influence on decision and allowed to play? In your casino example it’s dealer who is banned, not the roulette itself.

For example insider trading is regulated, following Polymarket’s takedown logic we should ban all trading.

In other words, would this bet be a problem if decision makers were banned from betting or profiting on it?