They've had multiple power crises recently in which survival was in question, so the particular outcome in the last one says less than the expected frequency for more borderline events in the future.
There is some silliness with the state government around renewable power, but it isn't like they've banned it. And if they did it would take #2 California a long time to catch up.
https://insideclimatenews.org/news/09032023/inside-clean-ene...
The question then is really whether Texas has a better chance of expanding capacity fast enough to meet its needs than other states that are famously more restrictive around new construction and environmental impacts. I don't like the politics here and I still think the answer to that is clearly yes for this purpose.
Whoever mentioned water has a point though.