It's hard to explain because I found it so unremarkable and banal.

But there was a small part of the book I took particular issue, "Your expectation on answering the question why goes deep. (No duh!) You might need to adjust your expectations of understanding to be less rigorous." He says the same thing in this video: https://www.youtube.com/watch?v=36GT2zI8lVA It's basically his book.

I think not only does this not match my personal experience, experience I've understood from others at large, but in particular Einstein who had deep insights because of his depths of understanding "why" in broad categories of topics. Einstein's brilliance was a synergistic understanding. Better, if we don't know something, it's best to say, "It's not yet understood" and explain expected horizons for exploration.

I would compare this attitude to Sabine Hossenfelder who says, "Yes! We can figure things out including quantum gravity. It's not our 'why's' that are wrong, but almost certainly our (amazingly crazy) assumptions."