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Why shouldn't electric plugs screw in?
(programming.dev)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
My guess to the biggest reason not to do this is safety - if somebody is being electrocuted, you want to be able to pull the cord out of the wall as quickly as possible to maximise their chance of survival.