I would like to go to Europe some day. Sure, I have the means to do it right now but that doesn't mean it's a good idea because it would seriously set back other goals I have. By putting off a trip to Europe for now, I can achieve all of my goals eventually. However, if I had a condition that would make long-term goals impossible, then sure, I would go to Europe now because I would no longer be sacrificing the now-impossible goals.
What happens if you spend all that money now and a perfect cure is found in 10 years for whatever condition you have? Where would that leave you?