I haven't been to the NFL, but friends took me to a baseball game while i's there. It was a Mariners game, very fun night. But i felt the pressure to spend on everything as soon as you walked in, it felt like the stadium was incompetition against each specatator over the contents of your wallet.

Luigi Zingales, a Chicago University Economist, recently did a Q&A where he talked about the two meanings of competition that the English language roles into the one word, that of competitions to defeat an opponent, and competitions creating something in kind. There are parts of the community that have opted for the first definition and act in all times against their opponents, as you say "weaponized greed". What they don't realise is what makes the market a force for good is acting with competitors, following the second defintion.

A good example is the downtown nightlife district of a city. Alone those bars and eateries might be nice establishments, but if they're the only option in town their product offering can become stale, but together in competition with each other they act to collectively create this fantastic and flexible destination for a night out.

As for hostile public spaces the same happens here l, in Australia, so so much. I even have to catch myself and correct my preconceived notions when i see someone laying in a park. I suppose the only difference is the economic interests are more evenly weighted, due to no detroit-like lobbyists.