I struggle often with this somewhat arbitrary desire for everything to be data-driven and backed by science. People hope, pray, follow best practices, listen to advice on the internet and yet, every now and then we are reminded that only fools do these things. Really intelligent people only listen to science and do things backed by science and lots of data. How does anyone accomplish anything if every step they take…
But that's not really the crux of this particular issue, it was pseudoscience not "not science". I.e. it was masquerading as being more scientifically founded than it was instead of just a book of this guy's personal understandings.