How do you know who is going to have the one important insight that leads to a dangerous advance? If I write everyone then they have at least heard of risks from AI and maybe think twice when they notice something dramatic.

I'm not questioning the value of writing to a broad range of people, or your initiative. I'm just discounting the authority of narrow AI experts on GAI - two different fields, the names of which are misleadingly similar. In this case the discount means that our estimate of existential risk need not increase too much. If Pat was a respected and influential GAI researcher it would be a far, far scarier indicator!