Why do clipless pedals have clips? Perhaps you can find the answer in an old magazine.
The term "clips" became associated with the old toe clips (like Biden uses).
The clipless system, which does use what we call a clip, but not the toe clip that is known as a clip (and you thought firearm terminology was confusing!) and allows the user to use a twisting motion to release from the pedal possibly predates the toe clip on a quill pedal. There is one report that the clipless pedal was invented by Charles Hanson in
1895. When you realize that the pedal bicycle was invented in the 1860s (1863 or 1866 depending on the source), you may see why I would like confirmation of Hanson's purported invention.
Anyway, the first commercially viable clipless pedal (with a clip, but not a toe clip) was the Cinelli M71 which required the rider to reach down and manually pull the release lever. I'm not sure why this crash-waiting-to-happen was a viable system, but...
A further anyway... in 1984 Look came out with the first modern, twist-to-release pedal system, and bicyclists (other than Biden) have taken to them like a duck to water.