Interesting quote as it is the giant issue that practically everybody in the industry has been talking about since the beginning of the wholesale electricity markets.

Economics 101 assumes some demand elasticity, but the wholesale markets are generally fully inelastic (maybe a tiny percentage point of that is elastic in many regions, while it's finally growing in others). These markets have to use administrative solutions to approximate the value to demand as they don't have a true aggregate demand curve built out of thousands of customers that are fully responsive to price.

We're retiring our thermal fleet at a rapid pace and load curtailment will be the only option on a fully renewable grid once the renewables drop in output and the storage runs out. We are making strides in that direction.

Maybe when he says "nobody" he's referring to the general public? I know this is an extremely common topic at the utility, ISO, FERC, academic, and so on level. As the comment points out, flexibility in demand allows for all kinds of neat tricks like pre-heating things when prices are cheap and supply is plentiful. The grid is so cool.