This is like saying you shouldn't learn to write unless you're going to be a writer; or that you shouldn't learn to do math unless you're going to be a mathemat

This is like saying you shouldn't learn to write unless you're going to be a writer; or that you shouldn't learn to do math unless you're going to be a mathematician; or that you shouldn't practice sports and athletics unless you're going to be a professional athlete. In any case, you don't learn to code so you can code. You learn to code so you can solve problems in a repeatable way.