Nobody's ever explained the why's and wherefore's to my satisfaction, either.
I suspect (though I may be ceremonially stripped of my cleats for letting the secret out), that such senseless language is nothing more (or less) than a rite of initiation. Once you can comfortably talk about "clipping in" to "clipless" pedals, you are an initiate to the cult, and there is no turning back. Kind of like a secret handshake.
This is my current theory and I'm sticking with it until proven wrong.
Give big space to the festive dog that make sport in the roadway. Avoid entanglement with your wheel spoke.
(Sign in Japan)
1978 Raleigh Gran Prix
2003 EZ Sport AX