You can't, for instance, call yourself a structural engineer unless you are registered with the regulatory authority as such. Nor can you offer engineering services to the public without registration. And you are bound by a code of ethics, subject to a formal complaint process, undergo somewhat regular practice reviews, and can face disciplinary actions when you fail to comply.
Right now, it seems like software engineering is the wild west, complete with tales of fortune to be had attracting code-slingin' cowboys without regard for the public's safety. I predict the lawman is coming for you.