I am not sure the fuel injection analogy will hold up here. There's nothing in a fuel injected car that will kill you unless you shove your arm into an exposed engine and try to run the starter or something, in which case you'd probably need two people and you'd have to be dumb enough to have left the battery connected. And even then you'd probably survive despite your crushed or amputated arm.

Electric cars are easily very lethal just by touching the wrong thing, or accidentally piercing a battery pack.