* The insider trading ones that will never lose money
* The wallstreetbets degenerates with enough money that it's a fun game even if you lose money
* People that have seen every chance they have at becoming moderately wealthy disappear under the current economic state of their country, where overwhelming debt is likely. The era of making it wealthy from a job is gone, an enormous part of the population is stuck going from small job to ubering, while being showered with videos of wealth from social media. The only way to make it out is gambling. Whether that's polymarket, sports betting, etc.
When you're already in a shit situation with no hope, "it's a zero sum game" isn't a good counterargument.