The problem in Texas was exacerbated by underinvestment in efficiency. Simply insulating homes more effectively would have allowed more resilience. A home is a kind of thermal battery, allowing load shifting due to its thermal inertia. The more insulation, the longer the thermal time constant, and the longer load can be shifted.

While I agree that houses should be better insulated (I built and live in a high performance home that uses a fraction of the energy of a typical home), the reality of Texas large and generally poorly constructed housing stock means it's even more important than that the grid is available.

In the near term, it's much cheaper to do that than to upgrade all the houses' envelopes (again, I'm a huge advocate of home efficiency).