I read each of the five "lessons learnt" in this article and thought to myself: "No shit, Sherlock!"
After the dot-com bubble burst in 2000, I ended up working in FinTech. It was an eye-opening experience and, ever since, I have been constantly amazed by the irrational optimism/arrogance/hubris of people who have zero experience in the sector but believe that they know better than people who have been working here for decades.
It's actually embarrassing at this point. To quote Lucky Green, God forbid "there might be something to be learned from several millenniums of financial services best practices."