IMHO that missed big parts of the picture, because it's kind of like saying that because we have an ample supply of trees for punch cards, there's no need to invest in magnetic tape and hard drives. There are big differences in the fundamental capabilities and costs of renewables versus fuel based economies.

Not only is an electrified economy powered by renewables a far cheaper future, it is also the difference between renting your energy infrastructure and owning it. With fuel based systems, the US is still susceptible to global fuel prices, as long as we participate in the global market, which leads to highly unstable prices. With renewables, you buy and then own, and don't have to worry about price instability; you have 30 years of stability from a solar panel. And when it reaches end of life, it continues working, giving more than a decade of opportunity to buy at the most convenient time and price.

Countries that switch earlier will have advantages. Countries that base their economy on being providers for panels and batteries may or may not see similar benefits, but renewables, even when purchased from other countries, give cheaper and more secure energy supply than even oil fields in your own country.