My assumption is that, when you work with this stuff every day, you become desensitized to it and underestimate the risk. When I was a freshman in electrical e

My assumption is that, when you work with this stuff every day, you become desensitized to it and underestimate the risk. When I was a freshman in electrical engineering, I was very careful about disconnecting power. By the time I graduated, me and others in the program would modify live circuits with wonton disregard. The voltages were too low for anything very bad to happen but I do know of at least one laptop that was sent into an emergency power shutdown mode and required some TLC to get it to boot again. You’d like to believe people would be more careful with plutonium cores, but people are lazy and careless.