Complex statements requiring lots of specialist knowledge available to very few human beings that are difficult to disprove is where the challenge lies.
anyways, more on topic with TFA, of course lots of people are looking for excuses for why they aren't what they want to be, and it sounds like this book flips the causation, so that people can say e.g. "I was perfectly healthy until I went through some difficult stuff and now I'm disabled" rather than much more sober but accurate "I was born with some relative weaknesses that make things more difficult for me than others." It looks like he keeps trying to claim that bad experiences leave reliably measurable marks in some way but it simply never holds to the claimed reliability under scrutiny.
Of course, knowing exactly what specific "weaknesses" one actually has compared to a statistical average is the hard part, and jumping to conclusions in that area is just as much playing with fire.
Someone could write a book about "bad experiences give you bad memories, which can bring down your mood when you remember them and demotivate you", but everyone already knows that, and leaving it at that doesn't give the reader the feeling of understanding why they feel less than whole.
If, say, Level 3 and Tata and Telia had a simultaneous outage, that would qualify for "a lot of the internet is down".
Which is uncomfortably pragmatic. Many people can go weeks while only directly interacting with a handful of Internet-based services, most of which are presented as apps.
I'm waiting for the day that the lines blur even further and people start saying "my Apple doesn't work" when AWS goes down and 1/3 of their iPhone apps stop working. Or the day that ISPs stop acting as carriers and the Internet truly factions.