The original dust speck vs. torture problem isn’t probabilistic. You’re asked to choose whether to dust-speck 3^^^3 people, or to torture someone; not whether to do it to yourself.
If we reformulate it to apply to the person making the decision, we should be careful—the result may not be the same as for the original problem. For instance, it’s not clear that making a single decision to dust-speck 3^^^3 people is the same as making 3^^^3 independent decisions to dust-speck each of them. (What do you do when the people disagree?)
The original dust speck vs. torture problem isn’t probabilistic. You’re asked to choose whether to dust-speck 3^^^3 people, or to torture someone; not whether to do it to yourself.
If we reformulate it to apply to the person making the decision, we should be careful—the result may not be the same as for the original problem. For instance, it’s not clear that making a single decision to dust-speck 3^^^3 people is the same as making 3^^^3 independent decisions to dust-speck each of them. (What do you do when the people disagree?)