Maybe having more nuclear power plants instead of wind would have helped? It sounds unrealistic for the energy generators to sell electricity at a loss over a 10 year period. It would be nice to see some of the data that the professor is referring to.
So why aren't you asking "maybe having more nuclear instead of natural gas would have helped?"
Since nuclear uses water, which freezes, the reason why the gas plants were knocked out, maybe the problem isn't the power source itself but the lack of weatherization?!