"a potentially dangerous chore, since a misstep could cripple the PC"
Wow, what a statement. There are endless ways to cripple your PC if you have no clue what you're doing. Hell, if you put the --delete in a 'find' call at the wrong place, that could cripple your PC as well.
You know what else is extremely dangerous and will most definitely cripple your PC? Ignorance about the system you are using. Computers are complicated machines. You can't hope to use one without having to learn how your system works.
It's like when your car breaks down for the first time and someone explains to you that you need to check the oil every once in a while. At some point you gotta look under the hood, otherwise you will break it.
So please spare me these observations about the outrageous hazards that come with your Windows operating system.