Earlier quoted context omitted.
It can be useful for insurance/hedging purposes. For example if you're a European farmer it might be rational to protect yourself from fertiliser price swings by buying/shorting natural gas futures, derivates or long dated delivery contracts. Polymarket bets on specific geopolitical events are just another option for this, which can be attractive depending on the price. Prediction markets have a pretty unique benefit…
There are a lot of baked in assumptions here. For instance, as an extreme example, betting on nuclear war or climate collapse happening and then "winning" doesn't really provide you anything of much use in the society you will be living in after such events.
Insurance / hedging is most useful in protecting you from realistic well defined risks that affect you personally but not the wider system.