Definitely read it (just find a free copy!).
I genuinely think, as with Belle Gibson etc, that people really want to believe you can reverse/cure terminal conditions through something entirely " natural" like walking, or drinking fruit smoothies or whatever. That's a comforting narrative. Our body as a temple in place of religion and us as humans, who if we are "good" in how we treat our bodies are guaranteed a long life. I can kind of see how believing that would give the same type of comfort as believing if you are good you will go to heaven.
And it's why people end up so blinkered in that belief that they will say frankly quite offensive things to people with terminal or chronic conditions.
I love yoga and healthy eating for their intrinsic benefits, they feel nice and make me happy, but I feel like punching people in the face when they insist a few warrior poses or some organic blueberries will magically cure my very real and serious neurological condition