I just watched a TikTok about how people used to plug in things to their light sockets when electricity was first becoming popular. And they kept calling the plug a light socket, what rule says it’s not a plug that screws in? And why shouldn’t plugs screw in? We have material science to make plugs and cables hard enough that if you kick the wire it still doesn’t come out. Electrical connections should be more secure. That’s all I’m saying.
They screwed bulbs in and out before light switches were invented. Switches are better.
As for the plug, pretty sure you had limited plugs. You had to plug in one device, and then unplug it and plug in the next. Ava you likely wanted to unplug when not in use. You wanted it tight but not so unwieldy that it was a pain. This was a good design. Never really had a problem with them coming out. The grounding plug which came later helps make it even more secure.