So is the lesson simply to prototype on paper/other mockup tool before coding? Even in high school comp sci our teacher drilled this into us. We even wrote 100

So is the lesson simply to prototype on paper/other mockup tool before coding? Even in high school comp sci our teacher drilled this into us. We even wrote 100% of our coding tests on paper, no computers allowed. As a result, I still mock not just screens and flow between them on paper, but also data structures, logic, etc as well. Immensely helpful. And I keep going back to paper for revisions and exploring/testing changes/ideas as well. It's easy to show someone a paper mockup and easy enough to get them to "test" it too.