Such "very deadly" voltage is in operation for decades very close to your house, yet it is somehow profitable. Granted, the cables aren't usually manipulated by

Such "very deadly" voltage is in operation for decades very close to your house, yet it is somehow profitable. Granted, the cables aren't usually manipulated by consumers. But the currently used car chargers are deadly already if you manage to do the things you describe. The cables and connectors are constructed to prevent it, this is very old and well-understood technology.