Are you nuts? Texas didn't move "towards unreliable power sources in order to protect themselves (and the world) from excessive warming". Texans don't believe in climate change. Not only that, it would have required planning. Their grid was unreliable because Texas didn't require the energy suppliers to make investments to make the grid reliable. That meant the energy suppliers got wealthier and, to throw the dog a bone, consumers got lower energy prices. So when an unplanned for emergency arose, they were shit out of luck. "Sorry. Oops." Thankfully AOC, everyone's favorite socialist, was there to save the day with water and groceries. Even Ted Cruz got involved. Instead of quarantining after his trip to Cancun to buy Snowflake a tutu, he loaded a couple of cases of water bottles into some peoples' car trunks until he threw his back out because he had never done a lick of work in his life. (I don't know whether Ted Cruz really threw his back out or not, but it's not beyond the realm of imagination and it sounded good.)
I don't know whether regulators or who were at fault. But, there are always catastrophes that happen that all the plans of mice and men will be to no avail. It's impossible to plan for every emergency or continguency. There's a limit to how much money you can spend. Do you have sprinklers installed in your house? why not? You know that smoke detectors only alert you to a fire but sprinklers put out the fire. Why haven't you spent the money to protect your family?
There's only so much money to go around. People, institutions governments, utilities, etc have to stop somewhere. This cold snap had not occurred in a hundred years. If you look at FEMA flood maps for insurance, they separate the areas by 100 years floods, 50-year floods, etc. If you get a mortgage, you need flood insurance if you're within a certain zone. Well, why not the less frequent zone? At some point, just like sprinklers, you cut off more spending because of diminishing returns.
Of course, God laughs at our logic and pulls a fast one just to keep us on our toes and our hubris in check. But disasters will always happen whether earthquakes or fires in California, storm surges on my Jersey Shore, or freezing in Texas. I hear they get locusts in Texas too, every now and then.