Earlier quoted context omitted.
It’s the insider betting that’s the problem. Not the intrinsic nature of gambling
You're always going to have some sort of insider leaks, and quite frankly I don't care if they make money off of it in a betting app. This isn't like the stock market which is a vehicle for wealth for hundreds of millions. Gambling/prediction markets are 100% optional to participate in and you should go in with the expectation that you're going to lose.
The stock market is 100% optional to participate in, and every broker tells you (is legally required to tell you, in fact) that you should go in with the expectation that you're going to lose money. That didn't stop whatever forces have made them essentially required to plan for the normal life stage of retirement these days.