Communication is really important, but it's not the end all be all for the job. It sounds like the author was "too busy" to communicate effectively and the lessons learned are what happens when you aren't listening, immediately shut down an idea, or tell someone to do something without knowing what you're after.
You live and learn. That's how you gain experience.
I mean a simple "let hires watch a video about our product" is just about saving some repetitive time... who asked for a "video onboarding solution"? And let the full tech team work on that for two weeks, jeeez! Be happy noone else noticed that wasted time and fired you?
A motivated PO could do this on his own if he has a little bit knowledge and the right tools in his spare hours (at least ours could)...should be good enough just for new hires. Or maybe better delegate that to some marketing guy that maybe even already has video material and who is done within half a day??
He's convinced that he has discovered a grand theory of human connection / relationships / energy / physics, and keeps interrupting in conversation to explain how something I've said is just an example of a deeper pattern.
Sadly, this theory of connection is cutting him off from actual connection - he gets so much validation from AI that he believes he has discovered a new world model. But the people around him aren't bought into the vision (mostly because it is bullshit), and so he ends up even more isolated.