I agree that it's strange, and I think it's sort of a quirk of how AI developed. I think some of the early, loud proponents of AI - especially in Silicon Valley circles - had sort of a weird (IMO) fascination with "existential risk" type questions. What if the AI "escapes" and takes over the world?
I personally don't find that a compelling concern. I grew up devoutly Christian and it has flavors of a "Pascal's Wager" to me.
But anyway, it was enough of a concern to those developing these latest AI's (e.g. it's core to Ilya's DNA at OpenAI), and - if true! - a significant enough risk that it warranted as much mindshare as it got. If AI is truly on the level of biohazards or nuclear weapons, then it makes sense to have a "safety" pillar as equal measure to its technical development.
However, as AI became more commercial and widespread and got away from these early founders, I think the "existential risk" became less of a concern, as more people chalked it up to silly sci-fi thinking. They, instead, became concerned with brand image, and the chatbot being polite and respectful and such.
So I think the "safety" pillar got sort of co-opted by the more mundane - but realistic - concerns. And due to the foundational quirks, safety is in the bones of how we talk about AI. So, currently we're in a state where teams get to enjoy the gravity of "existential risk" but actually work on "politeness and respect". I don't think it will shake out that way much longer.
For my money, Carmack has got the right idea. He wrote off immediately the existential risk concern (based on some napkin math about how much computation would be required, and latencies across datacenters vs GPUs and such), and is plowing ahead on the technical development without the headwinds of a "safety" or even "respect" thought. Sort of a Los Alamos approach - focus on developing the tech, and let the government or someone else (importantly: external!) figure out the policy side of things.