That's like comparing the discovery of a new fundamental force, with the discovery that mythical dragons have been living in secret among us as our lawyers. It's true that both are unlikely, but one is ridiculous and the other merely very very challenging.
I don't think it's all that ridiculous, it's over 80 years in the future. 80 years ago we were dying of all sorts of [now] easily preventable and curable diseases. Penicillin was not used until 1942!
The point was that so much has changed in the previous ~80 years that I don't think it's ridiculous to think things will be radically different ~80 years into the future.
Barring universally available, and highly advanced nanotech, it's ridiculous to think that all diseases will be "tackled" in ~80 years. In that same time frame it's much more likely that we'll be tackling issues of how to maintain a semblance of civilization, not achieving utopia.
