But that is exactly how power plants are using Bitcoin. That's the idea behind Seetee.
I didn't know about Seetee but potentially there are some minor opportunities to mine bitcoins (effectively as an on-demand load) to help balance the grid at short time scales. It also makes sense for a Norwegian Energy company to do this. However this is a tiny amount, especially compared to the efficiency losses the author is presenting in the graphic. I looked up some data I had handy right now and I think we are looking at a few percent of the overall energy consumed at most.