There's a very large contingent of ML researchers who think any idea of AI extinction risk is foolish because we don't have any evidence that intelligence equals compute. I've yet to see a single person give evidence that these two things are equal. What's more, the missing ingredient in any of these AGI extinction scenarios is desire (desire to act, desire to be, desire to love, to kill, etc.) and if you thought there was a paucity of evidence for intelligence = compute just wait till you see the evidence for transformers showing evidence of desire.
There's none. Not a shred of evidence. As ever, it's other human beings that are our greatest extinction risk.