I must say, that argument is better than what I had expected anyone to come up with - but I'm still utterly unconvinced. For example, it would pretty much foll

I must say, that argument is better than what I had expected anyone to come up with - but I'm still utterly unconvinced. For example, it would pretty much follow from your argument that we would have to force affected people to undergo surgery, as they could not possibly give informed consent to staying blind. You don't need first-hand experience with something in order to make an informed decision. Someone who has a haptic understanding of sharpness and an understanding of the finiteness of their life and of the general economical power of 10 m USD and possibly even an interest in philosophical questions surrounding perception [...] should very well be able to make an informed decision whether they think it's worth it for them. People also don't really know what it's like to live on a space station until they've been there, and yet astronauts very well are able to consent to being brought up there. Or for that matter, we allow people to never have that experience instead of forcing them to become astronauts, even though they can't value the experience (supposedly). Some decisions in life are difficult, but we absolutely do routinely allow people to make difficult decisions, and I think that's the right thing to do.