If you've ever picked up a pair of circular knitting needles and thought, "What's the point of circular knitting needles?" you're in good company. They look a bit unusual at first. Two needle tips connected by a cable does not immediately scream "simple and relaxing hobby".
One thing I often say to customers when this comes up is: Try imagining that the needle tips aren’t actually joined by a cable. Once you look at it that way, a circular needle is really just two knitting needles with a flexible connector between them. You're still making exactly the same stitches.