There's a bouldering gymn near my house and my fourth-grader has gotten really into it. She would rather swim when the pools are open, but once the weather gets colder we'll be there every weekend. I can do all of the beginner tracks and most of the 0-1s, even some of the 2s, but the difficulty goes up to 16 and the climbers who do anything above 5 seem to be thinking about the sport in a way I cant even visualize.
I’m no where near a pro…intermediate at best. I generally climb v-grades around 7-8. I know this feeling you’re talking about very much. Sometimes I revisit where I was, and where I’m at, and what once felt impossible to even imagine now just feels intuitive (of course it’s all relative, as anyone climbing v10 and above look like magicians to me). It sort of just happens naturally through practice and experience. Learning a skill is so wonderful!