The biggest "superpower" country in the world, the USA hosted the World Cup in 1994, and are again bidding for this event in 2022. In world cup terms, this is a short time between bids.
Would they, as a country who has experienced this event, bid for it again if it left a bad legacy, economic destruction etc etc?
This whole argument of taxpayer fund waste is a ridiculous smokescreen used by AFL fans that are worried about football..
Let's be real guys seriously....
The USA have the stadiums, and they are vacant at the right time. Right now is the off-season in the NFL. They don't need to build any more, nor do they have to worry about displacing and compensating other codes.
Plus, their bids are self-funded. Sure they get government support (political and diplomatic) but not funding. The UK for example are funding the bid through commercial sponsorship, not taxpayer funds.