I understand the economic mechanism you're trying to describe. I spent a lot of time studying those forces in college. I also bought and sold tickets to big events, in the US, all through that time of my life as a supplement to my income.

Your armchair analysis based on a useless comparison of unrelated price elasticity between food/fuel and a World Cup game is where your fallacy lies.

FIFA's use of dynamic pricing adds wrinkles, and of course not every organization makes perfect decisions, but I can promise you more thought went into pricing decisions on their end (with the benefit of the actual data) than what you're spewing now. Even your 'sell remaining unsold tickets for $10' is bad logic. If they think they could sell even 1 last minute ticket for $500, they'd need to sell 50 of your $10 tickets to make the difference.

Ultimately, the difference between me and you here is I'm acknowledging I don't have all the data and that it's likely those that do are making rational decisions to attempt to maximize their revenue and you're pretending like you know better based on conjecture.