Sticking with well proven technologies, such as batteries and solar which are deployed at massive scale by profit oriented investors on the Texas grid, makes far more sense than wasting precious few dollars and approvals on pie-in-the-sky nuclear projects that never meet their promises and might not even finish construction.
Building nuclear is hard, risky, expensive, and slow, in the very best cases. It's a shitty technology unless you have zero renewable resources in your country.
I agree that this means few decision makers believe climate change will literally end human life, or end industrialised society, in the near term. I disagree that any problem should be ignored unless it's existential.