>>718094684
>he believes "real" people (as real as they can be in that game) are all friendly like in the last shounen he finished watching
Anon, the moment they spread word telling others they have a cure, people would either say they are lying or, imagine that!, try to rob the cure so they can blackmail people for personal gains. Even if they accepted the "let's save the world together" bullshit they would look for a way to benefit themselves over it.
The Fireflies themselves wanted to have the cure in order to have the upper hand in any deal.