Ignoring the rest of your argument, 9000 is six tomes 1500 and there are nine million values in between (assuming costs have a resolution of tenths-of-a-cent). There was a bug, and the decision to feed the maximum value into the computer system to keep the lights on makes sense. But to think that should be the real cost doesn't.
Even that "excess" capacity was capped by what capacity still exists, so economic truths and results where demand exceeds supply still applies. And regulations basically mandate that power distributors/wholesalers must buy it if they need it and are able, no matter the cost.
They aren't allowed to make a judgment call that $7k is affordable but $8k is too costly, and just shut off power to their customers.
There were still govt effects limiting supply and mandating purchases, even at those prices.
And that's not an accident of policy; that's the intent, in artificially manipulating markets in support of agendas they can't outright mandate.
