Earlier quoted context omitted.
I hope everyone reading this realizes that commodity futures are useful and easily distinguished from prediction markets, which are a ruse to get around restrictions on gambling.
The world did fine before derivatives. In fact some might say it did even better. And gambling only makes the wealth gap worse. And there is a ton of nasty incentives linked to it.
The Hittites and Bronze-Age Egyptians had forward-deliverable contracts that, if you squint, they would trade amongst each other. The idea of being able to assign a contract to a third party to which you're a beneficiary is about as old as civilisation. In part because it's obvious. In part because it's impossible to police. But mostly because it's useful.
(I'm ignoring insurance and reinsurance, both of which are derivatives and rely heavily upon them.)