I'm not taking a position on the similarity or dissimilarity between shutting down a service because you can't bill accurately and shutting down a service because you refuse to interoperate with other providers.
All I'm saying is Texas customers did get their electricity cut off recently.
At any rate you are just looking for something to cry about. You asked for a hypothetical counter example not expecting to get one and now are splitting hairs to qualify big tears.
"As of Wednesday morning, when the power outages were at their most severe, the cold had snuffed out about 46 gigawatts, or about 40 percent, of power-generation capacity in the state."
Sounds a lot like the grid did in fact run out of "fuel" (as in the product that they deliver).
>You asked for a hypothetical counter example
Of an electricity provider cutting power of its own accord because their billing service was not functioning, not because the electricity production in Texas dropped due to freezing while demand shot up.