Very strange piece of article without any real reference or factual sources to back any claims. All of the claims are “trust me I know”. Also, I do not recall

Very strange piece of article without any real reference or factual sources to back any claims. All of the claims are “trust me I know”. Also, I do not recall my CS courses teaching me fullstack/backend/frontend, rather OS, compilers, algorithm design etc. I am seriously confused by this article, and when someone claims 60-70% boost followed by “from instinct”, I immediately stop reading but continued reading to the end and did not find anything interesting. What am I missing?