I don't agree that the energy consumption is a real concern because we don't have a comparison here for what other currencies cost. The cost seems like it should be fairly efficient because there are competing uses for energy.

I'm not sure exactly what the quoted text is trying to say or how it is relevant. I guess towards the notion of "decentralization"? What I would say here is that the reality is that we don't know the gini coefficient of a single thing in the universe except goods that are extraordinarily scarce (like "Mona Lisa paintings"). The estimates for these things for real-world currencies are laughably bad; they are based on self-reported statistics and upsampling, and they rarely reflect the actual scarce good -- effectively M0 of a single currency, which is a number we don't even have for Bitcoin because exchanges represent aggregated possession rather than actual ownership. So my point here is that yes, maybe that Gini coefficient looks bad, but it's the first time that we've even had a moderately realistic look at what a Gini coefficient looks like. Maybe they all look like this -- maybe gold is .99+, maybe Dollars are .99+, maybe Euros are .99+, maybe cigarettes in prison are .99+? Nakomoto coefficient is even more immeasurable for anything but cryptocurrencies, and also disregards aggregated records of deposits.