Your great-grandfather may have built his own house, your grandfather probably climbed the roof to replace some tiles which got blown off in a storm, your father may have stood on a ladder to paint the walls. They all seem to have survived long enough to reproduce so you are able to warn off people from trying to be self-reliant because it may hurt them.

Safety is certainly a consideration when contemplating projects like this one but it is by no means the only one and often not even the most important one. Safetyism is what you get when you make it the most important consideration, it is not a recipe for a healthy society.

BTW, if you really want to electrocute yourself that puny little battery won't do the trick, for that you need a a bit more voltage. Never fear, that is easily achieved by taking a few of those plastic snow poles used to mark out roads in colder places and filling them with 18650 cells. A 2 metre pole is good for 30 cells which give you about 130 Volts of DC fully charged. Those cells are capable of pushing quite a bit of current so if you're really into dangerous games that'd be an example of one.