Earlier quoted context omitted.
That isn't what the parent said: > Detect when the customer is tired or stressed and show higher prices. Detect price conscious customers and show them lower prices. Has nothing to do with supply and demand.
It has to do with demand.
While one person might be moody and more like to demand said product, another could be more rational and need more incentives to buy said product - hence nothing actually changes, and the mean is what will be used.
The impact on demand at that given time will need to be compared to the value. Trust me, it won't be equivalent.