onion2k was simply pointing out that titles are mostly rubbish. What people do is frequently quite different than their title. What the article was summing up a

onion2k was simply pointing out that titles are mostly rubbish. What people do is frequently quite different than their title. What the article was summing up and getting to with a little bit of a click-bait title was that when working in a startup you, as a software engineer (or whatever you prefer to be called), need to prioritize the customer and how the product solves the customers needs. Obviously the article goes into more detail.