Eh, most of his income and livelihood was from an ad company. Ads are equally wasteful as, and many times more harmful to the world than giga LLMs. I don't have a problem with that, nor do I have a problem with folks complainining about LLMs being wasteful. My problem is with him doing both.
You can't both take a Google salary and harp on about the societal impact of software.
Saying this as someone who likes rob pike and pretty much all of his work.