Not true.
Early in the crisis so much generation capacity went offline that there was no way that that it could meet all of the price-insensitive demand (most consumers pay a fixed price, regardless of wholesale prices). If you attempt to run the grid when demand exceeds supply it will damage generators, making the problem worse. To avoid that, regulators shut off power to people who still had a working connection to the grid and would have been happy to consume power at their contracted rates.
As generation came back online, prices dropped quite low because demand was artificially constrained. The regulators then overrode the market and set the price to the maximum allowed by the system to encourage all generators to come online, which would then allow them to start turning people's power back on.