The world kills its dreamers and visionaries because they exhaust those who have no dreams or visions. Those not blessed and burdened by having the Mystery revealed to them fear that these dreams and visions will kill them, and blast and burn away all they know. They can't allow this to happen.
Most humans cannot bear too much reality. They stick their faces into troughs and feed contentedly until they die while others use them for their own purposes. They spend their entire lives without lifting their faces out of their own blindness and seeing the universe - and themselves- for what it really is for a single moment.