One look at that image, and the reaction of a lot of people would be "they wouldn't sell it if it weren't safe".

Should the nanny state prevent the sale of such things? Well, ignoring that the nanny state disallows the sale of things like cannabis in many locations, I argue that people who are smarter than average can make things that the person of average intelligence is likely to unsafely use. We can post all of the dismissive comments we like, but a lot of people are $SOMETHING_OTHER_THAN_ELECTRICIAN_OR_PHYSICIST. If you look at that item and your reaction is "unsafe", well, good for you and thank your preferred deity for the privilege you've been given. Now see if you can spare a thought for those to whom it is not obvious. You've got your blindspots, too, but it doesn't necessarily make you stupid.

My undergrad was electrical engineering. I work as an engineer. I'm not inclined to buy one of these (and not just because I could simply make one if I wanted).