I don't agree with what appears to be the core premise of this article. Sure, if you want recognition or career benefit from your work, you have to advertise it. But this assumes that the purpose of work is getting recognition or money.
What if I want to do work for making the world a bit better? Submit a fix for an open source project anonymously? This article feels like the career drivel I so often see on LinkedIn.
Also, I might not want the world to benefit at all from my work. I could spend a year building a better alarm clock for my own personal use. Was my time wasted? I think that people should try to help others, but there is value in developing things for fully personal use. Not every program needs to be a product, startup or open source project. Not every solution needs to be a blog post.