I think torture v. dust specks and similar problems can be illuminated by flipping them around and examining them from the perspective of the potential victims. Given a choice between getting a dust speck in the eye with probability 1 or a 1-in-3^^^^^3 chance of being tortured, I suspect the vast majority of individuals will actually opt for the dust speck, and I don't think this is just insensitivity to the scope of 3^^^^^3. Dust specks are such a trivial inconvenience that people generally don't choose to do any of the easy things they could do to minimize the chances of getting one (e.g. regularly dusting their environment, wearing goggles, etc.) On the other hand, most people would do anything to stop being tortured, up to and including suicide if the torture has no apparent end point. The difference here is arguably not expressible as a finite number.

Pardon me, I have to go flush my cornea.