You forgot that the NG plants pay less for gas than residentials and the NG pipelines were diverted to residentials reducing supplies to NG power plants reducing electrical supply. Free market in action. Texas does not pay for much ‘spinning’ reserve so the price to pay for cheaper electrical rates overall is more blackouts in times of need. Free market in action.
NG should not be used for stationary generating stations. It is a fuel that is easy and relatively safe to use in residential settings and could serve as a useful portable fuel to replace gasoline and diesel if/when their price is too high or supply is low.
Coal and Nuclear power should be used for stationary electrical generation simply because it is available and the personnel who know how to use it must be highly trained.
In other words, use the difficult fuels at generation stations and leave the convenient and easy to use fuels for homes, businesses, and transportation. This would also go a long way to easing some of the pipeline issues that will inevitably get worse if we insist on a greater use of NG for electricity.