Nuclear energy and vaccines are extremely tightly controlled, tested before mass deployment, and we have mechanistic knowledge of how they work. The fact that

Nuclear energy and vaccines are extremely tightly controlled, tested before mass deployment, and we have mechanistic knowledge of how they work. The fact that we cannot exactly wrap our head around what this technology is and what it'll ultimately be capable of is reason for more concern, not less. A 600 Elo player doesn't beat a 1400 Elo player just because the 600 can't imagine the precise way in which he'll lose. The weaker player's inability to imagine this is exactly why he loses. That's the whole point of intelligence: seeing paths to goals that less intelligent entities cannot see.