Aha you can totally cut yourself with a safety razor (unless you mean the Mach 3 and not what this article is calling a double edged razor which has historically been called a "Safety razor" )
A straight edged razor, by contrast, is just a knife, that you actually can kill yourself with by slicing deep enough into your neck to take out a major artery. You can't do that with a safety/multi-edge razor.
The straight razor incidents were pretty traumatizing, so much blood..
Stay safe <3
Edit: I double checked, it actually was with a safety razor. They don't have any buffer to avoid slicing you up compared to a mach3 or modern disposable razor. Please do be careful folks, they are super sharp and a single swipe can cut you up real good.