And what they produce needs to be transported very long distances, resulting in huge power losses due to resistance.
If you read through the article, the screwing of the rate payer is that ERCOT buys power at the HIGHEST rate instead of being fiscally responsible and buying at the lowest rates available. As a result, at high demand, rates paid at over $4000 per mwh at peak are common. My son has a 2200 SF home, pays $500+ a month.
So even if wind power can supply at $4.50 mwh, if a power plant wants to charge $4000 mwh, the wind plants get paid at the $4000 mwh rate. The result is the fleecing of the rate payer.