When you have to pay thousands of dollars per mwh it is pretty likely that many in poorer areas wont pay. And yeah, that rate is not impossible in Texas, they even have a law capping how high it can go since it is a problem.
Edit: I am pretty sure that many poor homes wouldn't be able to pay a power bill of a few thousand dollars, which is what you'd pay if you have variable rate and ran as normal throughout the texas power crisis.
