> why can't do the same with wall plugs.

There is absolutely no scenario when a properly used wall plug is exposed when energized. Is is only possible when utter morons use "suicide cords":

• for extensible christmas lights they installed backwards so the socket end is near their wall socket. In that case, the user needs to suck it up and take it down then put it up the right way. It's an educational experience.

• for plugging in generators to a wall socket when the power goes out. This is illegal as fuck and dangerous to linemen working on the pole outside. An excellent way to bumble your way into manslaughter. When generators are used for a home, a generator inlet socket and transfer switch is used The house side is male with exposed pins, but due to the transfer switch it is physically impossible to have it connected to the house wiring while the house is fed from the mains, so it is safe.