Supply and demand do not have an inverse relationship. Demand exists, and when supply exceeds demand, prices fall. When supply does not meet demand, prices rise. You understand they are related but forgot the actual curve on the graph. Supply and demand can both be low, for instance, as is the case with mega yachts. Supply and demand have no direct effect on one another, though low supply does tend to encourage firms to increase supply to try to compete and meet the demand.
Data during prohibition is irrelevant to this specific discussion, because your claim is that demand goes up when goods are prohibited, which is false, as I showed with my link
I don’t believe you have actually taken Econ 101, given the things Ive seen you say here.