I don’t find myself explaining it to random people very often, but it’s been interesting seeing my dad’s understanding evolve. He usually comes to visit for several days twice a year. A few years ago he was a the “Why do you need lessons? You already know hot to ride!” phase. Then he came with me to a dressage clinic and saw how demanding and exacting even a training level lesson was. I’ve taken him to a dressage show where we’ve watched some mid-level tests, and watched GP on TV and he says “I don’t even understand how someone can get a horse to do those things” and I’ve explained that it starts with learning to control each of the horse’s body parts, the energy, balance, etc. and then slowly building up to the impressive movements that make up an upper level test.
I think I’ve used the figure skating analogy too - in the sense that I say, compared to what you see in the Olympics, what I’m doing is the equivalent of tottering around a skating rink trying not to fall on my ass.