Digiconomist's figures are entirely fake. They've been debunked but the author (and hapless news outlets) continue to promote them.
https://hackernoon.com/the-reports-of-bitcoin-environmental-...
https://hackernoon.com/the-reports-of-bitcoin-environmental-...
The argument summary of your article is hand waving, claims that the sum usage of software designed to be increasingly energy wasteful (Satoshi's random nonce lottery as a means of increasing CAPEX and decreasing production output)