The fact that they can just manipulate supply I what makes supply and demand a farce with oil. Demand doesn’t change the price, only supply.
Oil and gas could still be cheap today, there’s no shortage of oil at all, so they create the conditions necessary to benefit them. They’ll do exactly the same thing as demand for oil peters out, but they’ll wring the neck of that goose tighter and tighter until it finally dies. And it’s the people who can’t afford a new car that will suffer the worst when that happens.
Demand does change the price. You can see the price drop during economic downturns. Supply and demand are two sides of a single equation. It simply doesn’t make sense to say that only one impacts prices.
Prices had been dropping recently despite KSA reducing supply, until the attacks in Israel that is.