"Ending all disease" is way far out, off the wall. It is unrealistic and would be competely unsustainable. Something akin to promise of eternal youth.
The vegetarian/vegan equivalent poll:
If it took to eat an animal to end all carnivorousity, would you do it? How about 10? 100? 10,000?
P.S. The hypothetical underlying this poll sounds like a particular conspiracy theory one comes across now and then: "our current state of knowledge/technology is sufficient to end (your "favorite" scourge or medical anxiety here) forever, but we'll never see it happen because it'll eat into drug companies' profits."
P.P.S. And maybe (just maybe) this is an appropriate place to recite part of the script from http://bau2.uibk.ac.at/sg/python/Scripts/MeaningOfLife/mol.html :
http://bau2.uibk.ac.at/sg/python/Scripts/MeaningOfLife/m-04-i-2.html ("Yorkshire")
MUM: Come on, now. Out you go. Now, uh, Vincent, Tessa, Valerie, Janine, Martha, Andrew, Thomas, Walter, Pat, Linda, Michael, Evadne, Alice, Dominique, and Sasha, it's your bedtime.
CHILDREN: Aww, Mum!
MUM: Now, don't argue! Laura, Alfred, Nigel, Annie, Simon, Amanda,--
DAD: Wait! I've got something to tell the whole family.
MUM: Oh, quick. Go and get the others in, Gordon.
CHILDREN: What could it be? Shhh...
DAD: The mill's closed! There's no more work. We're destitute.
CHILDREN: [talking]
DAD: Come in, my little loves. I've got no option but to sell you all for scientific experiments.
CHILDREN: [whining]
DAD: No, no. That's the way it is, my loves. Blame the Catholic church for not letting me wear one of those little rubber things. Oh, they've done some wonderful things in their time. They preserved the might and majesty, the mystery of the Church of Rome, and the sanctity of the sacraments, the indivisible oneness of the Trinity, but if they'd let me wear one of those little rubber things on the end of my cock, we wouldn't be in the mess we are now.
[...]
CHILDREN: Ohh...
DAD: ...me mind's made up. I've given this long and careful thought, and it has to be medical experiments for the lot of you.
CHILDREN: Ohh. Oh. Oh...