I understand the hostility to them getting into sports betting since that seems to trigger a particular unhealthy impulse in young men but your anger should be

I understand the hostility to them getting into sports betting since that seems to trigger a particular unhealthy impulse in young men but your anger should be first directed at the companies that are 100% sports betting (DraftKings and their ilk). I don't think the normal things prediction markets do subject young men to the same temptations.