Nick Bostrom is a philosopher, not an engineer. If he spent his time actually making things instead of fear mongerng, he might have an appreciation for how truly difficult it is to actually get things to work, and the challenges that would still confront advanced AI. His instantaneous end-the-world outcomes are not plausible and will never be realized. Yet he argues for draconian, fascist controls on technology and s…
Because if he’s right we really, really want to pay attention to this problem so we don’t all die. I’m sure Bostrom abstracts away an enormous amount of the difficulty in implementation but that’s quite defensible. Moore’s Law isn’t the only curve that works well to explain technological trends for decades. We can see in broad outlines what’s coming decades from now.
You could say that about any doomsayer. It's important to use their reputation and authority, and your own context within reason, to weight the significance of their prophecies.