I think this piece misses. Electricity and hash power does translate to economic value. It gives you more share of the 6.25 reward. The author's argument is made by conflating economic value and security into one.
As a whole, the system produces 6.25 bitcoins every 10 minutes. The reward is a constant. But the BTCUSD price can go up. And it has always been going up. That means it's always profitable to invest in mining.
The original piece from Nick Grossman also misses. There're two problems with using Bitcoin as a battery. The first problem is Bitcoin has an unbounded energy use [1]. If its price continues to go up forever, that means we'd spend unbounded energy. The second problem is volatility. Unlike the aluminum example, Bitcoin has no intrinsic value. It has no practical applications like aluminum. Its price is pure speculation. With Bitcoin, we're converting energy into a volatile asset.
Bitcoin can be a battery. But it's a fairly bad one. It stores value with high volatility. The problem hindering Bitcoin's adoption is volatility. Changing the narrative from digital gold to battery won't fix the problem.
[1] https://bitflate.org/post/2021/02/05/the-bitcoin-price-parad...