Humans nearly died out entirely from hunger and thirst, it was visionaries that led them out of a dying region of Africa into Asia, by a route that appeared to defy reason to any non-visionary of the time.
Pre-humans nearly had their brains the size of a grapefruit and wired backwards. It was visionaries who developed fire, 2.5 million years ago, providing the much-needed nutrition that allowed us to avoid the same fate as every other lineage of hominid.
Visionaries allowed the Norse to split quartz in a way that permitted them to track the sun even in cloudy skies and well into twilight, giving them greater access to the seas, trade and food than any other society of that time.
Visionaries developed cities to handle the logistics of the brewing and baking industries, again counter to any "obvious" logic that farming and hunting were how you got food.
Visionaries are the reason you can post stuff on the Internet, and why persecuted minorities around the world can have a voice and education.
So don't tell a visionary that he is defying your common sense. His work may have implications for society that you cannot imagine simply because he has the imagination and you don't. That does not mean that it will have such an implication or that he does have that extra imagination. It simply means that visionaries have a track record of saving people from starvation.
What about normal people? Those are usually the ones who manufacture conditions suitable for mass starvation. They're the ones who create nothing but buy the rights to sue to oblivion those who do. They're the ones who have allowed security holes to develop in critical infrastructure, like nuclear power stations, and then place said infrastructure on the public Internet where anybody can play with it. They're the ones who deny Global Warming and have endangered all life on this planet.
At this point in history, we'd be better off if the normal people were rounded up, put on some nowhere continent, and left to rot at their own hands. This would also solve much of the operpopulation crisis, as they're also the ones that breed morons like rabbits. If they choose to become civilized, they're free to do so. That would be helpful, in fact. But as long as they remain normal (read: proto-human), their fate is their lookout but they've no business making it everyone else's fate too.