I feel like if I actually believed that the death of all biological life was imminent and that the only way to forestall it was to bomb data centers, I'd spend a lot more time planning how to bomb data centers and a lot less time curating Shoggoth memes on my web forum. On the other hand, if I were more concerned with self-aggrandizement, writing doomsaying thinkpieces for Time is exactly what I'd spend my time on.
Between that and advocating for an international treaty that treats GPUs the way the world currently treats plutonium? I think the latter has a higher chance of success, however small it may be.