I'm not trying to claim that prices didn't naturally rise by a lot, but in that particular situation (linked above), it's very clear that a lot of customers were paying $9/kWh when they could have paid $0.03/kWh. The latter is obviously easier to afford.
This event sucked for griddy customers, no doubt. But for the state of Texas and ERCOT to lock the price 300x higher than it would otherwise be is ridiculous.