Yes, derivatives do help market efficiency and general price discovery.
However, no, of course they do not affect basic supply and demand.
Traditionally, the premium on a future is only due to the cost of carry.
Corn farmers selling futures before a risky winter transfers their risk to a speculator, allowing the farmers to do what they're good at, farm corn.
This has nothing to do with the price of the asset.
The willingness for someone to acquire the asset, also known as demand, is what sets the price.
However, time is the ultimate truth-teller, so we'll have to see how the next few years play out 🚀