This is a benefit to our (UK) sockets, as laid out in BS 1363 and used in some other countries.
The cable exits the bottom, not the front, so it doesn't matter how thick or heavy it is, and pulling it out of the socket by the cable is very difficult.
Further, our earth pin is at the top by default, and our line and neutral pins are insulated to the extent that if the plug is far enough out of the socket to expose the uninsulated portion of the pins, it is no longer far enough into the socket to be receiving any voltage.