I think this true, and in agreement with the parent comment. A working complex system evolves out of a smaller working simple system. You have to climb the hill

I think this true, and in agreement with the parent comment. A working complex system evolves out of a smaller working simple system. You have to climb the hill from the one side. Getting to a complex, working system is the 'learning' part. If you want to be able to do the same things with a simpler system, then you have to do the work to collapse that back down to its fundamentals. I don't think it's something that can be 'taught' directly. I suspect it requires the experience of building the simple and then complicated things in order to understand the problem enough to make the complicated thing simpler.